def modelWithLogisticRegression(trainingData, validationData): ##Train the model using Logistic Regression that employs Stochastic Gradient Descent ##with different sets of parameters (i.e the value of lambda and the learning step size. ##Return the LR model with best accuracy rate #eta = [0.1, 0.3, 0.5, 1.0, 5.0] regularizationParamater = [.00000001, .0000005, 1., 1000., 100000.] bestLRModel = None bestAccuracy = 0 numOfIterations = 200 visualizationData = [] for regularizer in regularizationParamater: model = LogisticRegressionWithSGD.train(trainingData, numOfIterations, 1.0, regParam=regularizer) predict = validationData.map(lambda ad: (ad.label, model.predict(ad.features))) totalValidationAds = validationData.count() correctlyPredicted = predict.filter(lambda x: x[0] == x[1]).count() accuracy = float(correctlyPredicted)/totalValidationAds visualizationData += [(regularizer, accuracy)] if accuracy > bestAccuracy: bestAccuracy = accuracy bestLRModel = model return bestLRModel, visualizationData
def main():
MakePixelFileFromImages("./CarData/TrainImages/*pgm")
sc = SparkContext(appName="Image Classifier 01")
p = sc.textFile("pos.csv")
n = sc.textFile("neg.csv")
pFeatures = p.map(lambda image: image.split(","))
nFeatures = n.map(lambda image: image.split(","))
pExamples = pFeatures.map(lambda features: LabeledPoint(1, features))
nExamples = nFeatures.map(lambda features: LabeledPoint(0, features))
data = pExamples.union(nExamples)
(trainingData, testData) = data.randomSplit([0.7,0.3])
trainingData.cache()
model = LogisticRegressionWithSGD.train(trainingData)
labels_and_predictions = testData.map(lambda image:(image.label, model.predict(image.features)))
error_rate = labels_and_predictions.filter(lambda (val,pred): val!=pred).count() / float(testData.count())
print("************* RESULTS *******************")
print("Error Rate: " + str(error_rate))
pickle.dump(model, open("imageModel.pk1","wb"))
sc.stop()
def test_classification(self):
from pyspark.mllib.classification import LogisticRegressionWithSGD, SVMWithSGD, NaiveBayes
data = [
LabeledPoint(0.0, self.scipy_matrix(2, {0: 1.0})),
LabeledPoint(1.0, self.scipy_matrix(2, {1: 1.0})),
LabeledPoint(0.0, self.scipy_matrix(2, {0: 2.0})),
LabeledPoint(1.0, self.scipy_matrix(2, {1: 2.0}))
]
rdd = self.sc.parallelize(data)
features = [p.features for p in data]
lr_model = LogisticRegressionWithSGD.train(rdd)
self.assertTrue(lr_model.predict(features[0]) <= 0)
self.assertTrue(lr_model.predict(features[1]) > 0)
self.assertTrue(lr_model.predict(features[2]) <= 0)
self.assertTrue(lr_model.predict(features[3]) > 0)
svm_model = SVMWithSGD.train(rdd)
self.assertTrue(svm_model.predict(features[0]) <= 0)
self.assertTrue(svm_model.predict(features[1]) > 0)
self.assertTrue(svm_model.predict(features[2]) <= 0)
self.assertTrue(svm_model.predict(features[3]) > 0)
nb_model = NaiveBayes.train(rdd)
self.assertTrue(nb_model.predict(features[0]) <= 0)
self.assertTrue(nb_model.predict(features[1]) > 0)
self.assertTrue(nb_model.predict(features[2]) <= 0)
self.assertTrue(nb_model.predict(features[3]) > 0)
def train_committee(train_features, test_features, size=5):
committee = []
attempts = 0
max_attempts = size * 4
roc_threshold = 0.7
test_pairs_features = test_features.map(lambda p: process_batch(p, is_train=True))
test_labeled_pairs = test_pairs_features.map(to_labeled_point)
while len(committee) < size and attempts < max_attempts:
attempts += 1
pairs_features = train_features.map(lambda p: process_batch(p, is_train=True))
labeled_points = pairs_features.map(to_labeled_point).sample(True, 1)
model = LogisticRegressionWithSGD.train(labeled_points)
model.clearThreshold()
scores_and_labels = test_labeled_pairs.map(lambda p: (model.predict(p.features), p.label))
metrics = BinaryClassificationMetrics(scores_and_labels)
if metrics.areaUnderROC > roc_threshold:
print(attempts, metrics.areaUnderROC)
committee.append(model)
return committee
def test_classification(self):
from pyspark.mllib.classification import LogisticRegressionWithSGD, SVMWithSGD, NaiveBayes
data = [
LabeledPoint(0.0, [1, 0, 0]),
LabeledPoint(1.0, [0, 1, 1]),
LabeledPoint(0.0, [2, 0, 0]),
LabeledPoint(1.0, [0, 2, 1])
]
rdd = self.sc.parallelize(data)
features = [p.features.tolist() for p in data]
lr_model = LogisticRegressionWithSGD.train(rdd)
self.assertTrue(lr_model.predict(features[0]) <= 0)
self.assertTrue(lr_model.predict(features[1]) > 0)
self.assertTrue(lr_model.predict(features[2]) <= 0)
self.assertTrue(lr_model.predict(features[3]) > 0)
svm_model = SVMWithSGD.train(rdd)
self.assertTrue(svm_model.predict(features[0]) <= 0)
self.assertTrue(svm_model.predict(features[1]) > 0)
self.assertTrue(svm_model.predict(features[2]) <= 0)
self.assertTrue(svm_model.predict(features[3]) > 0)
nb_model = NaiveBayes.train(rdd)
self.assertTrue(nb_model.predict(features[0]) <= 0)
self.assertTrue(nb_model.predict(features[1]) > 0)
self.assertTrue(nb_model.predict(features[2]) <= 0)
self.assertTrue(nb_model.predict(features[3]) > 0)
def logistic_l2_accuracy(x_train, x_test, regParam):
# cache data to get reasonable speeds for methods like LogisticRegression and SVM
xc = x_train.cache()
# training logistic regression with L2 regularization
model = LogisticRegressionWithSGD.train(xc, regParam=regParam, regType="l2")
# making prediction on x_test
yhat = x_test.map(lambda p: (p.label, model.predict(p.features)))
# returning accuracy on x_test
return yhat.filter(lambda (v, p): v == p).count() / float(x_test.count())
def main():
"""
Driver program for a spam filter using Spark and MLLib
"""
# Consolidate the individual email files into a single spam file
# and a single ham file
makeDataFileFromEmails( "data/spam_2/", "data/spam.txt")
makeDataFileFromEmails( "data/easy_ham_2/", "data/ham.txt" )
# Create the Spark Context for parallel processing
sc = SparkContext( appName="Spam Filter")
# Load the spam and ham data files into RDDs
spam = sc.textFile( "data/spam.txt" )
ham = sc.textFile( "data/ham.txt" )
# Create a HashingTF instance to map email text to vectors of 10,000 features.
tf = HashingTF(numFeatures = 10000)
# Each email is split into words, and each word is mapped to one feature.
spamFeatures = spam.map(lambda email: tf.transform(email.split(" ")))
hamFeatures = ham.map(lambda email: tf.transform(email.split(" ")))
# Create LabeledPoint datasets for positive (spam) and negative (ham) data points.
positiveExamples = spamFeatures.map(lambda features: LabeledPoint(1, features))
negativeExamples = hamFeatures.map(lambda features: LabeledPoint(0, features))
# Combine positive and negative datasets into one
data = positiveExamples.union(negativeExamples)
# Split the data into 70% for training and 30% test data sets
( trainingData, testData ) = data.randomSplit( [0.7, 0.3] )
# Cache the training data to optmize the Logistic Regression
trainingData.cache()
# Train the model with Logistic Regression using the SGD algorithm.
model = LogisticRegressionWithSGD.train(trainingData)
# Create tuples of actual and predicted values
labels_and_predictions = testData.map( lambda email: (email.label, model.predict( email.features) ) )
# Calculate the error rate as number wrong / total number
error_rate = labels_and_predictions.filter( lambda (val, pred): val != pred ).count() / float(testData.count() )
print( "*********** SPAM FILTER RESULTS **********" )
print( "\n" )
print( "Error Rate: " + str( error_rate ) )
print( "\n" )
# Serialize the model for presistance
pickle.dump( model, open( "spamFilter.pkl", "wb" ) )
sc.stop()
def test_classification(self):
from pyspark.mllib.classification import LogisticRegressionWithSGD, SVMWithSGD, NaiveBayes
from pyspark.mllib.tree import DecisionTree, RandomForest, GradientBoostedTrees
data = [
LabeledPoint(0.0, [1, 0, 0]),
LabeledPoint(1.0, [0, 1, 1]),
LabeledPoint(0.0, [2, 0, 0]),
LabeledPoint(1.0, [0, 2, 1])
]
rdd = self.sc.parallelize(data)
features = [p.features.tolist() for p in data]
lr_model = LogisticRegressionWithSGD.train(rdd)
self.assertTrue(lr_model.predict(features[0]) <= 0)
self.assertTrue(lr_model.predict(features[1]) > 0)
self.assertTrue(lr_model.predict(features[2]) <= 0)
self.assertTrue(lr_model.predict(features[3]) > 0)
svm_model = SVMWithSGD.train(rdd)
self.assertTrue(svm_model.predict(features[0]) <= 0)
self.assertTrue(svm_model.predict(features[1]) > 0)
self.assertTrue(svm_model.predict(features[2]) <= 0)
self.assertTrue(svm_model.predict(features[3]) > 0)
nb_model = NaiveBayes.train(rdd)
self.assertTrue(nb_model.predict(features[0]) <= 0)
self.assertTrue(nb_model.predict(features[1]) > 0)
self.assertTrue(nb_model.predict(features[2]) <= 0)
self.assertTrue(nb_model.predict(features[3]) > 0)
categoricalFeaturesInfo = {0: 3} # feature 0 has 3 categories
dt_model = DecisionTree.trainClassifier(
rdd, numClasses=2, categoricalFeaturesInfo=categoricalFeaturesInfo)
self.assertTrue(dt_model.predict(features[0]) <= 0)
self.assertTrue(dt_model.predict(features[1]) > 0)
self.assertTrue(dt_model.predict(features[2]) <= 0)
self.assertTrue(dt_model.predict(features[3]) > 0)
rf_model = RandomForest.trainClassifier(
rdd, numClasses=2, categoricalFeaturesInfo=categoricalFeaturesInfo, numTrees=100)
self.assertTrue(rf_model.predict(features[0]) <= 0)
self.assertTrue(rf_model.predict(features[1]) > 0)
self.assertTrue(rf_model.predict(features[2]) <= 0)
self.assertTrue(rf_model.predict(features[3]) > 0)
gbt_model = GradientBoostedTrees.trainClassifier(
rdd, categoricalFeaturesInfo=categoricalFeaturesInfo)
self.assertTrue(gbt_model.predict(features[0]) <= 0)
self.assertTrue(gbt_model.predict(features[1]) > 0)
self.assertTrue(gbt_model.predict(features[2]) <= 0)
self.assertTrue(gbt_model.predict(features[3]) > 0)
def getLogisticRegressionModel(Train_Data):
numIters = 10
stepSize = 10.
regParam = 1e-6
regType = 'l2'
includeIntercept = True
return LogisticRegressionWithSGD.train(data = Train_Data,
iterations = numIters,
miniBatchFraction=0.1,
step = stepSize,
regParam = regParam,
regType = regType,
intercept = includeIntercept)
def logisticRegression(trainingRDD, trainingRDDHashed,
testRDDHashed, iterations, minibatch, stepsize):
# Train a Naive Bayes Model
trainedModel = LogisticRegressionWithSGD.train(
trainingRDD,
iterations=iterations,
miniBatchFraction=minibatch,
regType="l2",
intercept=True,
regParam=0.1,
step=stepsize)
# Test on Validation and Test Sets
resultsValidation = trainingRDDHashed.map(
lambda l_v24: (
(l_v24[0],
trainedModel.predict(
l_v24[1])),
1)).map(
lambda x_y25: (
checkState(
x_y25[0]),
x_y25[1])).reduceByKey(add).collectAsMap()
resultsTest = testRDDHashed.map(
lambda l_v26: (
(l_v26[0],
trainedModel.predict(
l_v26[1])),
1)).map(
lambda x_y27: (
checkState(
x_y27[0]),
x_y27[1])).reduceByKey(add).collectAsMap()
# Get Counts
nFilesV = trainingRDDHashed.count()
nFilesT = testRDDHashed.count()
# Create a dictionary of the Values
resultsValidation = defaultdict(lambda: 0, resultsValidation)
resultsTest = defaultdict(lambda: 0, resultsTest)
# Get F-Score and Accuracy Values
AccuracyV, fScoreV = getAccuracy(resultsValidation, nFilesV)
AccuracyT, fScoreT = getAccuracy(resultsTest, nFilesT)
# Print Results
print(' Results for Logistic Regression')
print(' Training Set: %.3f and F-Score: %.3f') % (AccuracyV, fScoreV)
print(' Test Set: %.3f and F-Score: %.3f') % (AccuracyT, fScoreT)
# Return the Result List
return AccuracyV, fScoreV, AccuracyT, fScoreT
def train_trend_model(self, model, data, i):
self.logger.info('Start to train the direction model')
rdd_data = self.sc.parallelize(data)
if self.trend_prediction_method == self.RANDOM_FOREST:
model = RandomForest.trainClassifier(rdd_data, numClasses=2, categoricalFeaturesInfo={}, numTrees=40,
featureSubsetStrategy="auto", impurity='gini', maxDepth=20,
maxBins=32)
elif self.trend_prediction_method == self.NAIVE_BAYES:
model = NaiveBayes.train(rdd_data)
elif self.trend_prediction_method == self.LOGISTIC_REGRESSION:
model = LogisticRegressionWithSGD.train(rdd_data, iterations=10000, step=0.001,
initialWeights=None if model is None else model.weights)
elif self.trend_prediction_method == self.SVM:
model = SVMWithSGD.train(rdd_data, iterations=10000, step=0.001,
initialWeights=None if model is None else model.weights)
return model
def main(input_file_path):
print('=====>>>>>')
print('ddd')
data = sc.textFile(input_file_path)
traning_data_RDD = data.filter(lambda line: line.split(',')[3] != '' and line.split(',')[0] != 'INDEX')
unseen_data_RDD = data.filter(lambda line: line.split(',')[3] == '')
traning_data_pddf = create_pddf(traning_data_RDD)
traning_data_df = sqlContext.createDataFrame(traning_data_pddf)
print(traning_data_df.head())
parsed_data = rdd_to_labeled_point(traning_data_df.rdd)
parsed_data.persist()
# Correct print: [LabeledPoint(1.0, [1.0,8.6662186586,6.98047693487])]
logisticRegressionWithSGD = LogisticRegressionWithSGD.train(parsed_data, iterations=100)
labels_and_preds = parsed_data.map(lambda lp: [lp.label, logisticRegressionWithSGD.predict(lp.features)])
Accuracy = labels_and_preds.filter(lambda ele: int(ele[0]) == int(ele[1])).count() / float(parsed_data.count())
print("Training Accuracy on training data = " + str(Accuracy))
unseen_data_pddf = create_pddf(unseen_data_RDD)
unseen_data_df = sqlContext.createDataFrame(unseen_data_pddf)
unseen_parsed_data = rdd_to_index_featurs(unseen_data_df.rdd)
unseen_parsed_data.persist()
file = open('/Users/1002720/Documents/workspace/SNU-project/data/BDA2Project/1-GenderPrediction/result.csv', 'w',
encoding='utf-8')
file.write('INDEX,GENDER\n')
for data in unseen_parsed_data.collect():
file.write(str(data[0]) + ',' + str(logisticRegressionWithSGD.predict(data[1]) + 1) + '\n')
# print(labels_and_preds.collect())
parsed_data.unpersist()
unseen_parsed_data.unpersist()
print('=====>>>>>')
print('=====>>>>>')
print('=====>>>>>')
print('=====>>>>>')
def test_classification(self):
from pyspark.mllib.classification import LogisticRegressionWithSGD, SVMWithSGD, NaiveBayes
from pyspark.mllib.tree import DecisionTree
data = [
LabeledPoint(0.0, self.scipy_matrix(2, {0: 1.0})),
LabeledPoint(1.0, self.scipy_matrix(2, {1: 1.0})),
LabeledPoint(0.0, self.scipy_matrix(2, {0: 2.0})),
LabeledPoint(1.0, self.scipy_matrix(2, {1: 2.0}))
]
rdd = self.sc.parallelize(data)
features = [p.features for p in data]
lr_model = LogisticRegressionWithSGD.train(rdd)
self.assertTrue(lr_model.predict(features[0]) <= 0)
self.assertTrue(lr_model.predict(features[1]) > 0)
self.assertTrue(lr_model.predict(features[2]) <= 0)
self.assertTrue(lr_model.predict(features[3]) > 0)
svm_model = SVMWithSGD.train(rdd)
self.assertTrue(svm_model.predict(features[0]) <= 0)
self.assertTrue(svm_model.predict(features[1]) > 0)
self.assertTrue(svm_model.predict(features[2]) <= 0)
self.assertTrue(svm_model.predict(features[3]) > 0)
nb_model = NaiveBayes.train(rdd)
self.assertTrue(nb_model.predict(features[0]) <= 0)
self.assertTrue(nb_model.predict(features[1]) > 0)
self.assertTrue(nb_model.predict(features[2]) <= 0)
self.assertTrue(nb_model.predict(features[3]) > 0)
categoricalFeaturesInfo = {0: 3} # feature 0 has 3 categories
dt_model = DecisionTree.trainClassifier(rdd, numClasses=2,
categoricalFeaturesInfo=categoricalFeaturesInfo)
self.assertTrue(dt_model.predict(features[0]) <= 0)
self.assertTrue(dt_model.predict(features[1]) > 0)
self.assertTrue(dt_model.predict(features[2]) <= 0)
self.assertTrue(dt_model.predict(features[3]) > 0)
all_types = []
for i in [str(i) for i in title.split(",")]:
schema = all_types.append(StructField(i, StringType(), True))
schema = StructType(all_types)
from pyspark.sql import Row
from pyspark.mllib.classification import LogisticRegressionWithSGD
from numpy import array
from pyspark.mllib.regression import LabeledPoint
D = 2 ** 24
def helper1(r):
features = []
try:
fe = r[1:-1]
for i in range(len(fe)):
features.append(float(abs(hash("VAR_" + str(i) + fe[i]))) % D)
target = float(r[-1])
ID = float(r[0])
return LabeledPoint(target, features)
except:
return LabeledPoint(0.0, [0.0] * 1932)
new_rdd = rdd.filter(lambda i: len(i) == 1934)
df = new_rdd.map(helper1)
model = LogisticRegressionWithSGD.train(df)
df.take(1)
splits = parsedData.randomSplit((0.9, 0.1)) train_set = splits[0] train_set.cache() test_set = splits[1] test_set.cache() #NBmodel = NaiveBayes.train(train_set) #NB_socredLabel = numpy.array(test_set.map(lambda lp: (NBmodel.predict(lp.features), lp.label)).sortByKey(ascending=False).map(lambda (k,v): v).collect()) #findCoveragePercent(NB_socredLabel, 0.4) SVMSGDmodel = SVMWithSGD.train(train_set) SVMSGDmodel.clearThreshold() SVM_scoredLabel = numpy.array(test_set.map(lambda lp: (SVMSGDmodel.predict(lp.features), lp.label)).sortByKey(ascending=False).map(lambda (k,v): v).collect()) SVM_percent.append(findCoveragePercent(SVM_scoredLabel, 0.4)) SVM_percent.append(findCoveragePercent(SVM_scoredLabel, 0.8)) SVM_percent.append(findCoveragePercent(SVM_scoredLabel, 1.0)) LRSGDmodel = LogisticRegressionWithSGD.train(train_set) LRSGDmodel.clearThreshold() LRSGD_scoedLabel = numpy.array(test_set.map(lambda lp: (LRSGDmodel.predict(lp.features), lp.label)).sortByKey(ascending=False).map(lambda (k,v): v).collect()) LRSGD_percent.append(findCoveragePercent(LRSGD_scoedLabel, 0.4)) LRSGD_percent.append(findCoveragePercent(LRSGD_scoedLabel, 0.8)) LRSGD_percent.append(findCoveragePercent(LRSGD_scoedLabel, 1.0)) LRLBFGSmodel = LogisticRegressionWithLBFGS.train(train_set) LRLBFGSmodel.clearThreshold() LRLBFGS_scoredLabel = numpy.array(test_set.map(lambda lp: (LRLBFGSmodel.predict(lp.features), lp.label)).sortByKey(ascending=False).map(lambda (k,v): v).collect()) LRLBFGS_percent.append(findCoveragePercent(LRLBFGS_scoredLabel, 0.4)) LRLBFGS_percent.append(findCoveragePercent(LRLBFGS_scoredLabel, 0.8)) LRLBFGS_percent.append(findCoveragePercent(LRLBFGS_scoredLabel, 1.0)) def getAccumulatedPercentage(socredLabel): result = [] total = socredLabel.sum()
import sys
from pyspark import SparkContext
from pyspark.mllib.classification import LogisticRegressionWithSGD
from pyspark.mllib.regression import LabeledPoint
def parsePoint(line):
"""
Parse a line of text into an MLlib LabeledPoint object.
"""
values = [float(s) for s in line.split(' ')]
if values[0] == -1: # Convert -1 labels to 0 for MLlib
values[0] = 0
return LabeledPoint(values[0], values[1:])
if __name__ == "__main__":
if len(sys.argv) != 3:
print("Usage: logistic_regression <file> <iterations>",
file=sys.stderr)
exit(-1)
sc = SparkContext(appName="PythonLR")
points = sc.textFile(sys.argv[1]).map(parsePoint)
iterations = int(sys.argv[2])
model = LogisticRegressionWithSGD.train(points, iterations)
print("Final weights: " + str(model.weights))
print("Final intercept: " + str(model.intercept))
sc.stop()
def create_model_libsvm(self, data, params):
numIterations = int(params.get('numIterations', 10))
return LogisticRegressionWithSGD.train(data, numIterations)
def test_classification(self):
from pyspark.mllib.classification import LogisticRegressionWithSGD, SVMWithSGD, NaiveBayes
from pyspark.mllib.tree import DecisionTree, DecisionTreeModel, RandomForest,\
RandomForestModel, GradientBoostedTrees, GradientBoostedTreesModel
data = [
LabeledPoint(0.0, [1, 0, 0]),
LabeledPoint(1.0, [0, 1, 1]),
LabeledPoint(0.0, [2, 0, 0]),
LabeledPoint(1.0, [0, 2, 1])
]
rdd = self.sc.parallelize(data)
features = [p.features.tolist() for p in data]
temp_dir = tempfile.mkdtemp()
lr_model = LogisticRegressionWithSGD.train(rdd, iterations=10)
self.assertTrue(lr_model.predict(features[0]) <= 0)
self.assertTrue(lr_model.predict(features[1]) > 0)
self.assertTrue(lr_model.predict(features[2]) <= 0)
self.assertTrue(lr_model.predict(features[3]) > 0)
svm_model = SVMWithSGD.train(rdd, iterations=10)
self.assertTrue(svm_model.predict(features[0]) <= 0)
self.assertTrue(svm_model.predict(features[1]) > 0)
self.assertTrue(svm_model.predict(features[2]) <= 0)
self.assertTrue(svm_model.predict(features[3]) > 0)
nb_model = NaiveBayes.train(rdd)
self.assertTrue(nb_model.predict(features[0]) <= 0)
self.assertTrue(nb_model.predict(features[1]) > 0)
self.assertTrue(nb_model.predict(features[2]) <= 0)
self.assertTrue(nb_model.predict(features[3]) > 0)
categoricalFeaturesInfo = {0: 3} # feature 0 has 3 categories
dt_model = DecisionTree.trainClassifier(
rdd, numClasses=2, categoricalFeaturesInfo=categoricalFeaturesInfo, maxBins=4)
self.assertTrue(dt_model.predict(features[0]) <= 0)
self.assertTrue(dt_model.predict(features[1]) > 0)
self.assertTrue(dt_model.predict(features[2]) <= 0)
self.assertTrue(dt_model.predict(features[3]) > 0)
dt_model_dir = os.path.join(temp_dir, "dt")
dt_model.save(self.sc, dt_model_dir)
same_dt_model = DecisionTreeModel.load(self.sc, dt_model_dir)
self.assertEqual(same_dt_model.toDebugString(), dt_model.toDebugString())
rf_model = RandomForest.trainClassifier(
rdd, numClasses=2, categoricalFeaturesInfo=categoricalFeaturesInfo, numTrees=10,
maxBins=4, seed=1)
self.assertTrue(rf_model.predict(features[0]) <= 0)
self.assertTrue(rf_model.predict(features[1]) > 0)
self.assertTrue(rf_model.predict(features[2]) <= 0)
self.assertTrue(rf_model.predict(features[3]) > 0)
rf_model_dir = os.path.join(temp_dir, "rf")
rf_model.save(self.sc, rf_model_dir)
same_rf_model = RandomForestModel.load(self.sc, rf_model_dir)
self.assertEqual(same_rf_model.toDebugString(), rf_model.toDebugString())
gbt_model = GradientBoostedTrees.trainClassifier(
rdd, categoricalFeaturesInfo=categoricalFeaturesInfo, numIterations=4)
self.assertTrue(gbt_model.predict(features[0]) <= 0)
self.assertTrue(gbt_model.predict(features[1]) > 0)
self.assertTrue(gbt_model.predict(features[2]) <= 0)
self.assertTrue(gbt_model.predict(features[3]) > 0)
gbt_model_dir = os.path.join(temp_dir, "gbt")
gbt_model.save(self.sc, gbt_model_dir)
same_gbt_model = GradientBoostedTreesModel.load(self.sc, gbt_model_dir)
self.assertEqual(same_gbt_model.toDebugString(), gbt_model.toDebugString())
try:
rmtree(temp_dir)
except OSError:
pass
# remove header
header = ibm_rdd.first()
ibm_data_rdd = ibm_rdd.filter(lambda x: x != header) \
.map(lambda x: x.split(',')) \
.map(lambda x: LabeledPoint(x[7],[x[8],x[9]]))
ibm_data_rdd.take(5)
# train and test model for 10 times
lst_score = []
for i in range(10):
ibm_train_rdd, ibm_test_rdd = ibm_data_rdd.randomSplit([.6, .4])
lrm = (LogisticRegressionWithSGD.train(ibm_train_rdd,
iterations=100,
step=1.0,
miniBatchFraction=1.0,
initialWeights=None,
regParam=0.01,
regType='l2'))
lst_predicted = (ibm_test_rdd.map(lambda x: x.features).map(
lambda x: lrm.predict(x)).collect())
lst_truth = ibm_test_rdd.map(lambda x: x.label).collect()
score = metrics.accuracy_score(lst_truth, lst_predicted)
lst_score.append(score)
print np.mean(lst_score)
#################################################
## demo 3: recommender system using ALS #########
#################################################
tfVectors = tf.transform(comment)
idf = IDF()
idfModel = idf.fit(tfVectors)
tfIdfVectors = idfModel.transform(tfVectors)
print(tfIdfVectors.take(3))
#需要用 RDD 的 zip 算子将这两部分数据连接起来，并将其转化为分类模型里的 LabeledPoint 类型
zip_score_comment = score.zip(tfIdfVectors)
final_data = zip_score_comment.map(lambda line:LabeledPoint(line[0],line[1]))
train_data,test_data = final_data.randomSplit([0.8,0.2],seed =0)
print(train_data.take(1))
time_start = time.time()
print(time_start)
#SVMModel = SVMWithSGD.train(train_data,iterations=100)
lrm = LogisticRegressionWithSGD.train(train_data,iterations=1000)
time_end = time.time()
cost_time = time_end - time_start
print("spark_lr cost_time:",cost_time)
predictionAndLabels = test_data.map(lambda t:(float(lrm.predict(t.features)),t.label))
print(predictionAndLabels.take(5))
metrics = MulticlassMetrics(predictionAndLabels)
print('accuracy:',metrics.accuracy)
print('precision:',metrics.weightedPrecision)
print('recall:',metrics.weightedRecall)
print('FMeasure:',metrics.weightedFMeasure())
from pyspark.mllib.regression import LabeledPoint
from pyspark.mllib.classification import LogisticRegressionWithSGD
data = [
LabeledPoint(0.0, [0.0, 1.0]),
LabeledPoint(1.0, [1.0, 0.0]),
]
lrm = LogisticRegressionWithSGD.train(sc.parallelize(data), iterations=10)
lrm.predict([1.0, 0.0])
lrm.predict([0.0, 1.0])
lrm.predict(sc.parallelize([[1.0, 0.0], [0.0, 1.0]])).collect()
lrm.clearThreshold()
lrm.predict([0.0, 1.0])
def buildModel(trainrdd):
model = LogisticRegressionWithSGD.train(trainrdd)
#model = LinearRegressionWithSGD.train(trainrdd)
return model
test_labels = test_labels_rdd.collect()
ensemble_test = []
for i in range(0, len(test_labels), 1):
l1 = [test_labels[i]]
ensemble_test.append(l1)
train_labels_rdd = train_data.map(lambda p: p.label)
train_labels = train_labels_rdd.collect()
ensemble_train = []
for i in range(0, len(train_labels), 1):
l1 = [train_labels[i]]
ensemble_train.append(l1)
# C1
# Build the Model
model = LogisticRegressionWithSGD.train(train_data)
# Predict Labels
c1_predict_labels_test_rdd = test_data.map(lambda p:
(model.predict(p.features)))
c1_predict_labels_train_rdd = train_data.map(lambda p:
(model.predict(p.features)))
c1_predict_labels_test = c1_predict_labels_test_rdd.collect()
c1_predict_labels_train = c1_predict_labels_train_rdd.collect()
# Append Labels
appendColumn(ensemble_test, c1_predict_labels_test)
appendColumn(ensemble_train, c1_predict_labels_train)
# C2
# Build the Model
import numpy as np
from pyspark.mllib.classification import LogisticRegressionWithSGD
from pyspark import SparkContext, SparkConf
from pyspark.mllib.linalg import Vectors
from pyspark.mllib.regression import LabeledPoint
conf = SparkConf().setMaster("local").setAppName("Test")
sc = SparkContext(conf=conf)
sparse_data = [
LabeledPoint(0.0, Vectors.dense([1.0, 0.0])),
LabeledPoint(1.0, Vectors.dense([0.0, 1.0])),
LabeledPoint(0.0, Vectors.dense([10.0, 9.0])),
LabeledPoint(1.0, Vectors.dense([9.0, 10.0]))
]
sparse_data = [
LabeledPoint(0.0, Vectors.dense([1.0, 0.0])),
LabeledPoint(1.0, Vectors.dense([0.0, 1.0])),
LabeledPoint(0.0, Vectors.dense([10.0, 9.0])),
LabeledPoint(1.0, Vectors.dense([9.0, 10.0]))
]
rdd = sc.parallelize(sparse_data)
model = LogisticRegressionWithSGD.train(rdd, iterations=10)
rdd = rdd.map(lambda x:x.features)
model.predict(rdd).saveAsTextFile("result/hdfs")
sc.stop()
vectorize_start = time.time()
vectorized_data = training_data.map(mapper_CF)
vectorized_testing_data = testing_data.map(mapper_CF)
"""
train_instances = vectorized_data.count()
test_instances = vectorized_testing_data.count()
total_instances = train_instances + test_instances
train_per = float(train_instances)/total_instances * 100
test_per = float(test_instances)/total_instances * 100
#"""
vectorize_end = time.time()
print "******************VECTORIZING: DONE********************"
#building a logistic regression training model
train_start = time.time()
model = LogisticRegressionWithSGD.train(vectorized_data)
train_end = time.time()
print "******************MODEL TRAINING: DONE********************"
#predicting classes for testing data and evaluating
def mapper_predict(x):
predicted_class = model.predict(x.features)
#predicted_class = int(round(predicted_class))
actual_class = x.label
return (actual_class, predicted_class)
pred_start = time.time()
actual_and_predicted = vectorized_testing_data.map(mapper_predict)
count = actual_and_predicted.count()
pred_end = time.time()
print "******************PREDICTION: DONE********************"
def spark_create_model(data_size, file_path, store=False):
"""
Spark Model Creation
"""
# Set this variable to distinguish between logistic and linear regression
REGRESSION_TYPE = 'logistic'
sc = SparkContext(appName="SparkCreateModel")
# load Twitter data
if data_size == 'small':
twitter_data = load_data_from_file(
sc, "file:///root/mongoData/small_twitter.json")
else:
twitter_data = load_data_from_file(
sc, "file:///root/mongoData/twitter.json")
# load YouTube data
if data_size == 'small':
youtube_data = load_data_from_file(
sc, "file:///root/mongoData/small_youtube.json")
else:
youtube_data = load_data_from_file(
sc, "file:///root/mongoData/youtube.json")
youtube_data = youtube_data.filter(filter_youtube_data)
# load Facebook data
if data_size == 'small':
facebook_data = load_data_from_file(
sc, "file:///root/mongoData/small_facebook.json")
else:
facebook_data = load_data_from_file(
sc, "file:///root/mongoData/facebook.json")
# Store the sentiment score for each data item
sent_twitter_data = twitter_data.map(lambda x: get_sentiment(x, 'twitter'))
sent_youtube_data = youtube_data.map(lambda x: get_sentiment(x, 'youtube'))
sent_facebook_data = facebook_data.map(
lambda x: get_sentiment(x, 'facebook'))
#create MLLib LabeledPoints
twitter_LP = sent_twitter_data.map(
lambda x: create_labeled_points_twitter(x, REGRESSION_TYPE))
youtube_LP = sent_youtube_data.map(
lambda x: create_labeled_points_youtube(x, REGRESSION_TYPE))
facebook_LP = sent_facebook_data.map(
lambda x: create_labeled_points_facebook(x, REGRESSION_TYPE))
# split data in to training (80%) and test(20%) sets
train_twitter, test_twitter = twitter_LP.randomSplit([0.8, 0.2], seed=0)
train_youtube, test_youtube = youtube_LP.randomSplit([0.8, 0.2], seed=0)
train_facebook, test_facebook = facebook_LP.randomSplit([0.8, 0.2], seed=0)
#combine all 3 datasets with the RDD.union command
train_LP = train_twitter.union(train_facebook).union(train_youtube)
test_LP = test_twitter.union(test_facebook).union(test_youtube)
# Build logistic regression model
model_log = LogisticRegressionWithSGD.train(train_LP)
if store == True:
model_log.save(sc, file_path)
# Evaluate the model on training data
preds_train_log = train_LP.map(lambda p:
(p.label, model_log.predict(p.features)))
total_train = float(train_LP.count())
trainErr_log = preds_train_log.filter(lambda
(v, p): v != p).count() / total_train
# Evaluate the model on test data
preds_test_log = test_LP.map(lambda p:
(p.label, model_log.predict(p.features)))
total_test = float(test_LP.count())
testErr_log = preds_test_log.filter(lambda
(v, p): v != p).count() / total_test
twitter_LP_count = twitter_LP.count()
youtube_LP_count = youtube_LP.count()
facebook_LP_count = facebook_LP.count()
print('TWITTER LP COUNT %d' % (twitter_LP_count))
print('YOUTUBE LP COUNT %d' % (youtube_LP_count))
print('FACEBOOK LP COUNT %d' % (facebook_LP_count))
print("Train Error = " + str(trainErr_log))
print("Test Error = " + str(testErr_log))
print(model_log)
sc.stop()
label = 0
values = [x if x < genre else x-1 for x in values] #shift the attributes by one index
ones = []
ones = [1] * len(values)
return LabeledPoint(label, SparseVector(column_num-1, values, ones))
#set hdfs path
data = sc.sequenceFile("hdfs://nameservice1/user/geap/warehouse/camus/etl/rat/hourly/2015/06/01/00/*")
data = sc.sequenceFile("hdfs://localhost:9000/test/*")
parsedData = data.filter(filterPoint).map(parsePoint).reduceByKey(lambda x, y : x + y).map(lambda (k, v) : list(set(v)))
parsedData.cache()
#Calculate total number of columns in the dataset
column_num = parsedData.flatMap(lambda _ : _ ).distinct().count()
column_id = parsedData.flatMap(lambda _ : _ ).distinct().collect()
column_id.sort()
#choose a genre to test, default is 100th column as target variable
genre = 1
sortedData = parsedData.map(sortPoint)
labeledData = sortedData.map(lambda line : (line, genre)).map(labelData)
LRSGDmodel = LogisticRegressionWithSGD.train(labeledData)
print LRSGDmodel.weights
def parse_interaction_chi(line):
line_split = line.split(",")
# leave_out = [1,2,3,19,20.41]
clean_line_split = line_split[0:1] + line_split[4:19] + line_split[21:41]
attack = 1.0
if line_split[41] == 'normal.':
attack = 0.0
return LabeledPoint(attack, np.array([float(x) for x in clean_line_split]))
training_data_chi = raw_data.map(parse_interaction_chi)
test_data_chi = test_raw_data.map(parse_interaction_chi)
t0 = time()
logit_model_chi = LogisticRegressionWithSGD.train(training_data_chi)
tt = time() - t0
print "Classifier trained in {} seconds".format(round(tt, 3))
labels_and_preds = test_data_chi.map(
lambda p: (p.label, logit_model_chi.predict(p.features)))
t0 = time()
test_accuracy = labels_and_preds.filter(lambda (v, p): v == p).count() / float(
test_data_chi.count())
tt = time() - t0
print "Prediction made in {} seconds. Test accuracy is {}".format(
round(tt, 3), round(test_accuracy, 4))
# ------------- RDD basics ------------------
from pyspark.mllib.regression import LabeledPoint
from pyspark.mllib.feature import HashingTF
from pyspark.mllib.classification import LogisticRegressionWithSGD
conf = SparkConf().setMaster("local").setAppName("My App")
sc = SparkContext(conf = conf)
spam = sc.textFile("/home/sakib/spark-1.3.1/spark_workspace/data/spam.txt")
normal = sc.textFile("/home/sakib/spark-1.3.1/spark_workspace/data/ham.txt")
# Create a HashingTF instance to map email text to vectors of 10,000 features.
tf = HashingTF(numFeatures = 10000)
# Each email is split into words, and each word is mapped to one feature.
spamFeatures = spam.map(lambda email: tf.transform(email.split(" ")))
normalFeatures = normal.map(lambda email: tf.transform(email.split(" ")))
# Create LabeledPoint datasets for positive (spam) and negative (normal) examples.
positiveExamples = spamFeatures.map(lambda features: LabeledPoint(1, features))
negativeExamples = normalFeatures.map(lambda features: LabeledPoint(0, features))
trainingData = positiveExamples.union(negativeExamples)
trainingData.cache() # Cache since Logistic Regression is an iterative algorithm.
# Run Logistic Regression using the SGD algorithm.
model = LogisticRegressionWithSGD.train(trainingData)
# Test on a positive example (spam) and a negative one (normal). We first apply
# the same HashingTF feature transformation to get vectors, then apply the model.
posTest = tf.transform("O M G GET cheap stuff by sending money to ...".split(" "))
negTest = tf.transform("Hi Dad, I started studying Spark the other ...".split(" "))
print "Prediction for positive test example: %g" % model.predict(posTest)
print "Prediction for negative test example: %g" % model.predict(negTest)
sqlContext = SQLContext(sc)
### Prepare Undirected Data
undirected_relation_df = sqlContext.read.load(undirected_relation_json_file,
format="json")
#.limit(100)
undirectedParsedData = undirected_relation_df.map(
lambda point: parsePoint(point))
print("@@@@@@@@@@@@@@@@@@@@@ 0 @@@@@@@@@@@@@@@@@@@@@@")
print("undirectedParsedData == " + str(undirectedParsedData.take(10)))
print("@@@@@@@@@@@@@@@@@@@@@ END0 @@@@@@@@@@@@@@@@@@@@@@")
### Build ModeL undirected
undirectedModel = LogisticRegressionWithSGD.train(undirectedParsedData)
undirectedModel.clearThreshold()
undirectedModel.save(sc, mainPath + "undireced_relation_model")
undirectedLabelsAndPreds = undirectedParsedData.map(lambda point: (
point.label, float(undirectedModel.predict(point.features))))
undirectedLabelsAndPredsIndexed = undirectedLabelsAndPreds.zipWithIndex().map(
lambda (x, y): (y, x))
print("@@@@@@@@@@@@@@@@@@@@@ 0 @@@@@@@@@@@@@@@@@@@@@@")
print("undirectedLabelsAndPredsIndexed == " +
str(undirectedLabelsAndPredsIndexed.take(10)))
print("@@@@@@@@@@@@@@@@@@@@@ END0 @@@@@@@@@@@@@@@@@@@@@@")
######################################################
#join with productsIds
productsIds = undirected_relation_df.map(lambda point: getIds(point))
.map(lambda lp: len(lp.features.indices))
.sum())
Test.assertEquals(numNZVal, 372080, 'incorrect number of features')
# ** CTR prediction and logloss evaluation **
from pyspark.mllib.classification import LogisticRegressionWithSGD
# fixed hyperparameters
numIters = 50
stepSize = 10.
regParam = 1e-6
regType = 'l2'
includeIntercept = True
model0 = LogisticRegressionWithSGD.train(OHETrainData, numIters, stepSize, 1.0, None, regParam, regType, includeIntercept)
sortedWeights = sorted(model0.weights)
print sortedWeights[:5], model0.intercept
# TEST Logistic regression
Test.assertTrue(np.allclose(model0.intercept, 0.56455084025), 'incorrect value for model0.intercept')
Test.assertTrue(np.allclose(sortedWeights[0:5],
[-0.45899236853575609, -0.37973707648623956, -0.36996558266753304,
-0.36934962879928263, -0.32697945415010637]), 'incorrect value for model0.weights')
# ** Log loss **
from math import log
def computeLogLoss(p, y):
def train(row_id_str,
ds_id,
hdfs_feat_dir,
local_out_dir,
ml_opts_jstr,
excluded_feat_cslist,
sp_master,
spark_rdd_compress,
spark_driver_maxResultSize,
sp_exe_memory,
sp_core_max,
zipout_dir,
zipcode_dir,
zip_file_name,
mongo_tuples,
labelnameflag,
fromweb,
training_fraction,
jobname,
random_seed=None):
### generate data folder and out folder, clean up if needed
#local_out_dir = local_out_dir + "/"
#if os.path.exists(local_out_dir):
# shutil.rmtree(local_out_dir) # to keep smaplelist file
if not os.path.exists(local_out_dir):
os.makedirs(local_out_dir)
# create zip files for Spark workers ================= ================
zip_file_path = ml_util.ml_build_zip_file(zipout_dir,
zipcode_dir,
zip_file_name,
prefix='zip_feature_util')
print "INFO: zip_file_path=", zip_file_path
# get_spark_context
sc = ml_util.ml_get_spark_context(sp_master, spark_rdd_compress,
spark_driver_maxResultSize,
sp_exe_memory, sp_core_max, jobname,
[zip_file_path])
t0 = time()
# check if ml_opts.has_excluded_feat ==1 ===================================
has_excluded_feat = 0
ml_opts = {}
if not ml_opts_jstr is None:
ml_opts = json.loads(ml_opts_jstr)
if "has_excluded_feat" in ml_opts:
has_excluded_feat = ml_opts["has_excluded_feat"]
#print "has_excluded_feat=",has_excluded_feat,",excluded_feat_cslist=",excluded_feat_cslist
# get excluded feature list from mongo ========== ===
if str(has_excluded_feat) == "1" and excluded_feat_cslist is None:
excluded_feat_cslist = ml_util.ml_get_excluded_feat(
row_id_str, mongo_tuples)
print "INFO: excluded_feat_cslist=", excluded_feat_cslist
# filename for featured data
libsvm_data_file = os.path.join(hdfs_feat_dir, "libsvm_data")
print "INFO: libsvm_data_file:", libsvm_data_file
# load feature count file
feat_count_file = libsvm_data_file + "_feat_count"
feature_count = zip_feature_util.get_feature_count(sc, feat_count_file)
print "INFO: feature_count=", feature_count
# load sample RDD from text file
# also exclude selected features in sample ================ =====
# format (LabeledPoint,hash) from str2LabeledPoint_hash()
#samples_rdd = MLUtils.loadLibSVMFile(sc, libsvm_data_file)
samples_rdd, feature_count = zip_feature_util.get_sample_rdd(
sc, libsvm_data_file, feature_count, excluded_feat_cslist)
# get distinct label list
labels_list_all = samples_rdd.map(
lambda p: p[0].label).distinct().collect()
# split samples to training and testing data, format (LabeledPoint,hash)
training_rdd, testing_rdd = samples_rdd.randomSplit(
[training_fraction, 1 - training_fraction], seed=int(random_seed))
training_rdd = training_rdd.map(lambda p: p[0]) # keep LabeledPoint only
training_rdd.cache()
training_sample_count = training_rdd.count()
training_lbl_cnt_list = training_rdd.map(
lambda p: (p.label, 1)).reduceByKey(add).collect()
testing_rdd.cache()
testing_sample_count = testing_rdd.count()
testing_lbl_cnt_list = testing_rdd.map(
lambda p: (p[0].label, 1)).reduceByKey(add).collect()
sample_count = training_sample_count + testing_sample_count
# random_seed testing
if not random_seed is None:
all_t = testing_rdd.collect()
all_t = sorted(all_t, key=lambda x: x[1])
cnt = 0
for i in all_t:
print i[1]
cnt = cnt + 1
if cnt > 3:
break
t1 = time()
print "INFO: training sample count=", training_sample_count, ", testing sample count=", testing_sample_count
print "INFO: training label list=", training_lbl_cnt_list, ", testing label list=", testing_lbl_cnt_list
print "INFO: labels_list_all=", labels_list_all
print "INFO: training and testing samples generated!"
print 'INFO: running time: %f' % (t1 - t0)
t0 = t1
###############################################
###########build learning model################
###############################################
### get the parameters###
print "INFO: ======Learning Algorithm and Parameters============="
#ml_opts = json.loads(ml_opts_jstr)
model_name = ml_opts[
'learning_algorithm'] # 1: linear_svm_with_sgd; 2: logistic_regression_with_lbfgs; 3: logistic_regression_with_sgd
iteration_num = 0
if 'iterations' in ml_opts:
iteration_num = ml_opts['iterations']
C = 0
if 'c' in ml_opts:
C = eval(ml_opts['c'])
regularization = ""
if 'regularization' in ml_opts:
regularization = ml_opts['regularization']
print "INFO: Learning Algorithm: ", model_name
print "INFO: C = ", C
print "INFO: iterations = ", iteration_num
print "INFO: regType = ", regularization
regP = C / float(training_sample_count)
print "INFO: Calculated: regParam = ", regP
### generate label names (family names) #####
### connect to database to get the column list which contains all column number of the corresponding feature####
if labelnameflag == 1:
'''
key = "dic_name_label"
jstr_filter='{"rid":'+row_id_str+',"key":"'+key+'"}'
jstr_proj='{"value":1}'
# get parent dataset's data
if ds_id != row_id_str:
jstr_filter='{"rid":'+ds_id+',"key":"'+key+'"}'
doc=query_mongo.find_one_t(mongo_tuples, jstr_filter, jstr_proj)
dic_list = doc['value']
print "INFO: dic_list=",dic_list
label_dic = {}
for i in range(0, len(dic_list)):
for key in dic_list[i]:
label_dic[dic_list[i][key]] = key.encode('UTF8')
'''
label_dic = ml_util.ml_get_label_dict(row_id_str, mongo_tuples, ds_id)
print "INFO: label_dic:", label_dic
else:
label_dic = {}
label_set = set(labels_list_all)
for label_value in label_set:
label_dic[int(label_value)] = str(int(label_value))
print "INFO: generated label_dic:", label_dic
labels_list = []
for key in sorted(label_dic):
labels_list.append(label_dic[key])
print "INFO: labels:", labels_list
class_num = len(labels_list)
if class_num > 2:
print "INFO: Multi-class classification! Number of classes = ", class_num
### build model ###
if model_name == "linear_svm_with_sgd":
### 1: linearSVM
print "INFO: ====================1: Linear SVM============="
model_classification = SVMWithSGD.train(
training_rdd,
regParam=regP,
iterations=iteration_num,
regType=regularization) # regParam = 1/(sample_number*C)
#print model_classification
elif model_name == "logistic_regression_with_lbfgs":
### 2: LogisticRegressionWithLBFGS
print "INFO: ====================2: LogisticRegressionWithLBFGS============="
model_classification = LogisticRegressionWithLBFGS.train(
training_rdd,
regParam=regP,
iterations=iteration_num,
regType=regularization,
numClasses=class_num) # regParam = 1/(sample_number*C)
elif model_name == "logistic_regression_with_sgd":
### 3: LogisticRegressionWithSGD
print "INFO: ====================3: LogisticRegressionWithSGD============="
model_classification = LogisticRegressionWithSGD.train(
training_rdd,
regParam=regP,
iterations=iteration_num,
regType=regularization) # regParam = 1/(sample_number*C)
else:
print "INFO: Training model selection error: no valid ML model selected!"
return
print "INFO: model type=", type(model_classification)
# create feature coefficient file ================================
coef_arr = None
intercept = None
if model_classification.weights is None:
print "WARNING: model weights not found!"
else:
coef_weights = model_classification.weights
#print "coef_weights=",coef_weights
#print type(coef_weights),coef_weights.shape
coef_arr = coef_weights.toArray().tolist()
# save coef_arr to mongo
key = "coef_arr"
ret = ml_util.save_json_t(row_id_str, key, coef_arr, mongo_tuples)
# save coef_arr to local file
if ret == 0:
# drop old record in mongo
filter = '{"rid":' + row_id_str + ',"key":"coef_arr"}'
ret = query_mongo.delete_many(mongo_tuples, None, filter)
if not os.path.exists(local_out_dir):
os.makedirs(local_out_dir)
fn_ca = os.path.join(local_out_dir, row_id_str,
row_id_str + "_coef_arr.pkl")
print
ml_util.ml_pickle_save(coef_arr, fn_ca)
# save intercept to mongo
intercept = model_classification.intercept
key = "coef_intercept"
ret = ml_util.save_json_t(row_id_str, key, intercept, mongo_tuples)
# feature list + coef file =============
feat_filename = os.path.join(local_out_dir,
row_id_str + "_feat_coef.json")
print "INFO: feat_filename=", feat_filename
# create feature, coef & raw string file =============================================== ============
# expect a dict of {"fid":(coef, feature_raw_string)}
jret = ml_util.build_feat_list_t(row_id_str, feat_filename, None, None,
coef_arr, ds_id, mongo_tuples)
# special featuring for IN or libsvm
if jret is None:
jret = ml_util.build_feat_coef_raw_list_t(row_id_str,
feat_filename, coef_arr,
ds_id, mongo_tuples)
if jret is None:
print "WARNING: Cannot create sample list for testing dataset. "
jfeat_coef_dict = jret
print "INFO: coef_arr len=", len(
coef_arr), ", feature_count=", feature_count
# for multi-class
if len(coef_arr) != feature_count:
jfeat_coef_dict = {}
print "WARNING: coef count didn't match feature count. multi-class classification was not supported"
# Calculate prediction and Save testing dataset
bt_coef_arr = sc.broadcast(coef_arr)
bt_intercept = sc.broadcast(intercept)
bt_jfeat_coef_dict = sc.broadcast(jfeat_coef_dict)
### Evaluating the model on testing dataset: label, predict label, score, feature list
print "INFO: intercept=", intercept
print "INFO: coef_arr len=", len(coef_arr), type(coef_arr)
print "INFO: jfeat_coef_dict len=", len(
jfeat_coef_dict) #, jfeat_coef_dict
# get prediction of testing dataset : (tlabel, plabel, score, libsvm, raw feat str, hash) ==============================
if len(coef_arr) == feature_count:
testing_pred_rdd = testing_rdd.map(lambda p: (
p[0].label \
,model_classification.predict(p[0].features) \
,zip_feature_util.calculate_hypothesis(p[0].features, bt_coef_arr.value, bt_intercept.value, model_name) \
,p[0].features \
,p[1] \
) ).cache()
else: # for multi-class, no prediction score; TBD for better solution: how to display multiple weights for each class
testing_pred_rdd = testing_rdd.map(lambda p: (
p[0].label \
,model_classification.predict(p[0].features) \
,"-" \
,p[0].features \
,p[1] \
) ).cache()
''',p[0].features.dot(bt_coef_arr.value)+bt_intercept.value \
# Save testing dataset for analysis
libsvm_testing_output = hdfs_feat_dir + "libsvm_testing_output_"+row_id_str
print "INFO: libsvm_testing_output=", libsvm_testing_output
try:
hdfs.rmr(libsvm_testing_output)
except IOError as e:
print "WARNING: I/O error({0}): {1}".format(e.errno, e.strerror)
except:
print "WARNING: Unexpected error at libsvm_testing_output file clean up:", sys.exc_info()[0]
# save only false prediction?
#testing_pred_rdd.filter(lambda p: p[0] != p[1]).saveAsTextFile(libsvm_testing_output)
testing_pred_rdd.saveAsTextFile(libsvm_testing_output)
'''
#test_tmp=testing_pred_rdd.collect()
# save false prediction to local file
false_pred_fname = os.path.join(local_out_dir,
row_id_str + "_false_pred.json")
print "INFO: false_pred_fname=", false_pred_fname
false_pred_data=testing_pred_rdd.filter(lambda p: p[0] != p[1])\
.map(lambda p: (p[0],p[1],p[2] \
,zip_feature_util.get_dict_coef_raw4feat(zip_feature_util.sparseVector2dict(p[3]), bt_jfeat_coef_dict.value)
,p[4] ) ) \
.collect()
print "INFO: false predicted count=", len(false_pred_data)
false_pred_arr = []
with open(false_pred_fname, "w") as fp:
for sp in false_pred_data:
jsp = {
"tlabel": sp[0],
"plabel": sp[1],
"score": sp[2],
"feat": sp[3],
"hash": sp[4]
}
#print "jsp=",jsp
false_pred_arr.append(jsp)
fp.write(json.dumps(false_pred_arr))
# save prediction results, format: label, prediction, hash
pred_ofname = os.path.join(local_out_dir,
row_id_str + "_pred_output.pkl")
print "INFO: pred_ofname=", pred_ofname
pred_out_arr = testing_pred_rdd.map(lambda p:
(p[0], p[1], p[4])).collect()
ml_util.ml_pickle_save(pred_out_arr, pred_ofname)
'''
one_item= testing_pred_rdd.first()
print "one_item=",one_item
sparse_arr=one_item[3]
dict_feat=zip_feature_util.sparseVector2dict(sparse_arr)
print "len=",len(dict_feat),"dict_feat=",dict_feat
dict_weit=zip_feature_util.add_coef2dict(coef_arr,dict_feat)
print "len=",len(dict_weit),"dict_weit=",dict_weit
'''
# Calculate Accuracy. labelsAndPreds = (true_label,predict_label)
labelsAndPreds = testing_pred_rdd.map(lambda p: (p[0], p[1]))
labelsAndPreds.cache()
testing_sample_number = testing_rdd.count()
testErr = labelsAndPreds.filter(lambda (v, p): v != p).count() / float(
testing_sample_number)
accuracy = 1 - testErr
print "INFO: Accuracy = ", accuracy
### Save model
#save_dir = config.get('app', 'HADOOP_MASTER')+'/user/hadoop/yigai/row_6/'
#save_dir = config.get('app', 'HADOOP_MASTER')+config.get('app', 'HDFS_MODEL_DIR')+'/'+row_id_str
save_dir = os.path.join(config.get('app', 'HADOOP_MASTER'),
config.get('app', 'HDFS_MODEL_DIR'), row_id_str)
try:
hdfs.ls(save_dir)
#print "find hdfs folder"
hdfs.rmr(save_dir)
#print "all files removed"
except IOError as e:
print "WARNING: I/O error({0}): {1}".format(
e.errno, e.strerror), ". At HDFS=", save_dir
except:
print "WARNING: Unexpected error:", sys.exc_info(
)[0], ". At HDFS=", save_dir
model_classification.save(sc, save_dir)
###load model if needed
#sameModel = SVMModel.load(sc, save_dir)
t1 = time()
print 'INFO: training run time: %f' % (t1 - t0)
t0 = t1
###############################################
###########plot prediction result figure ==================================================== ===============
###############################################
labels = labelsAndPreds.collect()
true_label_list = [x for x, _ in labels]
pred_label_list = [x for _, x in labels]
pred_fname = os.path.join(local_out_dir, row_id_str + "_1" + ".png")
true_fname = os.path.join(local_out_dir, row_id_str + "_2" + ".png")
pred_xlabel = 'Prediction (Single Run)'
true_xlabel = 'True Labels (Single Run)'
test_cnt_dic = ml_util.ml_plot_predict_figures(
pred_label_list, true_label_list, labels_list, label_dic,
testing_sample_count, pred_xlabel, pred_fname, true_xlabel, true_fname)
print "INFO: figure files: ", pred_fname, true_fname
#print "INFO: Number of samples in each label is=", test_cnt_dic
roc_auc = None
perf_measures = None
dataset_info = {
"training_fraction": training_fraction,
"class_count": class_num,
"dataset_count": sample_count
}
#############################################################
###################for 2 class only (plot ROC curve) ==================================================== ===============
#############################################################
if len(labels_list) == 2:
do_ROC = True
reverse_label_dic = dict((v, k) for k, v in label_dic.items())
if 'clean' in reverse_label_dic:
flag_clean = reverse_label_dic['clean']
elif 'benign' in reverse_label_dic:
flag_clean = reverse_label_dic['benign']
elif '0' in reverse_label_dic:
flag_clean = 0
else:
print "INFO: No ROC curve generated: 'clean','benign' or '0' must be a label for indicating negative class!"
do_ROC = False
# build data file for score graph
score_graph_fname = os.path.join(local_out_dir,
row_id_str + "_score_graph.json")
print "INFO: score_graph_fname=", score_graph_fname
# build score_arr_0, score_arr_1
# format: tlabel, plabel, score, libsvm, raw feat str, hash
graph_arr = testing_pred_rdd.map(lambda p:
(int(p[0]), float(p[2]))).collect()
score_arr_0 = []
score_arr_1 = []
max_score = 0
min_score = 0
for p in graph_arr:
if p[0] == 0:
score_arr_0.append(p[1])
else:
score_arr_1.append(p[1])
# save max,min score
if p[1] > max_score:
max_score = p[1]
elif p[1] < min_score:
min_score = p[1]
ml_build_pred_score_graph(score_arr_0, score_arr_1, model_name,
score_graph_fname, max_score, min_score)
if do_ROC:
perf_measures = ml_util.calculate_fscore(true_label_list,
pred_label_list)
print "RESULT: perf_measures=", perf_measures
'''
# calculate fscore ==========
tp = labelsAndPreds.filter(lambda (v, p): v == 1 and p==1 ).count()
fp = labelsAndPreds.filter(lambda (v, p): v == 0 and p==1 ).count()
fn = labelsAndPreds.filter(lambda (v, p): v == 1 and p==0 ).count()
tn = labelsAndPreds.filter(lambda (v, p): v == 0 and p==0 ).count()
print "RESULT: tp=",tp,",fp=",fp,",fn=",fn,",tn=",tn
precision=float(tp)/(tp+fp)
recall=float(tp)/(tp+fn)
print "RESULT: precision=",precision,",recall=",recall
acc=(tp+tn)/(float(testing_sample_number))
fscore=2*((precision*recall)/(precision+recall))
print "RESULT: fscore=",fscore,",acc=",acc
'''
model_classification.clearThreshold()
scoreAndLabels = testing_rdd.map(lambda p: (
model_classification.predict(p[0].features), int(p[0].label)))
#metrics = BinaryClassificationMetrics(scoreAndLabels)
#areROC = metrics.areaUnderROC
#print areROC
scoreAndLabels_list = scoreAndLabels.collect()
if flag_clean == 0:
scores = [x for x, _ in scoreAndLabels_list]
s_labels = [x for _, x in scoreAndLabels_list]
testing_N = test_cnt_dic[0]
testing_P = test_cnt_dic[1]
else:
scores = [-x for x, _ in scoreAndLabels_list]
s_labels = [1 - x for _, x in scoreAndLabels_list]
testing_N = test_cnt_dic[1]
testing_P = test_cnt_dic[0]
# create ROC data file ======== ====
roc_auc = ml_create_roc_files(row_id_str, scores, s_labels,
testing_N, testing_P, local_out_dir,
row_id_str)
#, local_out_dir, file_name_given)
perf_measures["roc_auc"] = roc_auc
# only update db for web request ==================================================== ===============
if fromweb == "1":
#print "database update"
str_sql="UPDATE atdml_document set "+"accuracy = '"+str(accuracy*100)+"%" \
+"', status = 'learned', processed_date ='"+str(datetime.datetime.now()) \
+"', perf_measures='"+json.dumps(perf_measures) \
+"', dataset_info='"+json.dumps(dataset_info) \
+"' where id="+row_id_str
ret = exec_sqlite.exec_sql(str_sql)
print "INFO: Data update done! ret=", str(ret)
else:
print "INFO: accuracy = '" + str(accuracy * 100) + "%"
print 'INFO: Finished!'
return 0
X_train = sc.parallelize(np.random.uniform(0,10,[nb_train,P])) w = np.random.uniform(size=[P+1,]) y_train = X_train.map(f = lambda a: w[0] + np.dot(a,w[1:])) y_train_mean = y_train.mean() y_train = y_train.map(f = lambda val: 1 if val > y_train_mean else 0) data_train = y_train.zip(X_train).map(f = lambda tu: LabeledPoint(tu[0],tu[1])) X_test = sc.parallelize(np.random.uniform(0,10,[nb_test,P])) y_test = X_test.map(f = lambda a: w[0] + np.dot(a,w[1:])) y_test_mean = y_test.mean() y_test = y_test.map(f = lambda val: 1 if val > y_test_mean else 0) t1 = time.time() lrm = LogisticRegressionWithSGD.train(data_train,iterations = 10) y_pred = lrm.predict(X_test) print "*******************************" nb_corr = np.sum(np.array(y_test.collect()) == np.array(y_pred.collect())) print nb_corr print "the accuracy is ", nb_corr/float(nb_test) print "*******************************" t2 = time.time() print "time elapsed spark logistic regression ", t2 - t1 lrm_bfgs = LogisticRegressionWithLBFGS.train(data_train) y_pred = lrm_bfgs.predict(X_test) print "*******************************"
return sc
sc = getSparkContext()
# Load and parse the data
data = sc.textFile("/data.txt")
def mapper(line):
"""
Mapper that converts an input line to a feature vector
"""
feats = line.strip().split(",")
# labels must be at the beginning for LRSGD, it's in the end in our data, so
# putting it in the right place
label = feats[len(feats) - 1]
feats = feats[: len(feats) - 1]
feats.insert(0,label)
features = [ float(feature) for feature in feats ] # need floats
return LabeledPoint(label, features)
parsedData = data.map(mapper)
model = LogisticRegressionWithSGD.train(parsedData, iterations=100)
labelsAndPreds = parsedData.map(lambda point: (point.label, model.predict(point.features)))
trainErr = labelsAndPreds.filter(lambda p: p[0] != p[1]).count() / float(parsedData.count())
print("Training Error = " + str(trainErr))
# Imports
# SGD = Stochastic Gradient Descent. Convex optimization to optimize objective functions.
from pyspark.mllib.classification import LogisticRegressionWithSGD
from pyspark.mllib.regression import LabeledPoint
from pyspark import SparkContext
from numpy import array
sc = SparkContext("local", "SVM")
# Loading and parsing data
def parsePoint(line):
vals = [float(i) for i in line.split(' ')]
return LabeledPoint(vals[0], vals[1:])
# Sample data provided by Spark 1.3.1 folder
data = sc.textFile("jingrong/sample_svm_data.txt")
parsedData = data.map(parsePoint)
# Building the model
model = LogisticRegressionWithSGD.train(parsedData)
# Evaluate the model based on training data
labelAndPreds = parsedData.map(lambda p: (p.label, model.predict(p.features)))
trainingError = labelAndPreds.filter(lambda (v, p): v != p).count() / float(
parsedData.count())
print "Training Error: ", str(trainingError)
random_state=0)
for train_index, test_index in ss:
X_training, Y_training, X_test, Y_test = [], [], [], []
for i in train_index:
X_training.append(X[i])
Y_training.append(Y[i])
for i in test_index:
X_test.append(X[i])
Y_test.append(Y[i])
parsedData = []
for i in range(0, len(X_training)):
parsedData.append(LabeledPoint(Y_training[i], X_training[i]))
model = LogisticRegressionWithSGD.train(sc.parallelize(parsedData))
model.clearThreshold()
probas = []
for i in range(0, len(X_test)):
b = model.predict(X_test[i])
probas.append(b)
# Compute ROC curve and area the curve
tpr, fpr, thresholds = roc_curve(Y_test, probas)
roc_auc = auc(fpr, tpr)
plt.plot(fpr, tpr, lw=1, label='ROC (area = %0.2f)' % (roc_auc))
plt.xlim([-0.05, 1.05])
plt.ylim([-0.05, 1.05])
plt.xlabel('False Positive Rate')
plt.ylabel('True Positive Rate')
if len(sys.argv) != 3:
logger.error(USAGE)
sys.exit(0)
trainFile = sys.argv[1]
testFile = sys.argv[2]
sc = SparkContext("local", "SVM: Schizophrenia")
trainData = sc.textFile(trainFile)
# sc.parallelize( trainData )
train = trainData.map(parsePoint)
train.persist()
testData = sc.textFile(testFile)
# sc.parallelize( testData )
test = testData.map(parsePoint)
test.persist()
model = LogisticRegressionWithSGD.train(train)
labelsAndPreds = test.map(lambda p: (p.label, model.predict(p.features)))
# accuracy = labelsAndPreds.filter(lambda (v, p): True if p == 1.0 else False ).count() / float(test.count())
error = labelsAndPreds.filter(
lambda (v, p): int(v) != int(p)).count() / float(test.count())
with open("error.txt", "w") as f:
f.write("Accuracy: {0}\n".format(1 - error))
f.write("Error: {0}\n".format(error))
labelsAndPreds.saveAsTextFile(str(time.time()) + ".txt")
#Test the accuracy of predicition and print the time taken
start = timer()
test_accuracy = trainingLabelAndPreds1.filter(
lambda (v, p): v == p).count() / float(testData.count())
end = timer()
elapsed = end - start
print '\nPrediction made in: ', elapsed, 'seconds with LBFGS'
print '\nTest Accuracy is: ', round(test_accuracy, 4)
trainingError1 = trainingLabelAndPreds1.map(
lambda (r1, r2): float(r1 != r2)).mean()
print '\nLBFGS training error: ', trainingError1
elif modelSelection == 'sgd':
start = timer()
model2 = LogisticRegressionWithSGD.train(trainingData,
iterations=50,
intercept=True)
end = timer()
elapsed = end - start
globalModel = model2
print '\nClassifier trained in ', elapsed, ' seconds with SGD'
# Evaluate the training and test errors
trainingLabelAndPreds2 = trainingData.map(
lambda point: (point.label, model2.predict(point.features)))
#Test the accuracy of predicition and print the time taken
start = timer()
test_accuracy = trainingLabelAndPreds2.filter(
lambda (v, p): v == p).count() / float(testData.count())
end = timer()
from pyspark.mllib.regression import LabeledPoint
from numpy import array
import parse
# Load and parse the data
#def parsePoint(line): # Creating vector(array) with first input as y and others as xi's
# values = [float(x) for x in line.split(',')]
# return LabeledPoint(values[10], values[0:9])
sc = SparkContext("local[4]", "Logistic Regression") #Initialized SparkContext
data = sc.textFile("/home/ayush/Data /Data for Machine Learning/UCI Adult Data Set/UCI adult.data") #Created an RDD
parsedData = data.map(parse.parsePoint) #RDD Transformation on the input RDD which is string and converting them to labeled points and each labeled points is a tuple of float(label) and ndrarray(features)
# Build the model
model = LogisticRegressionWithSGD.train(parsedData) #Pass an RDD to "train" method of class LogisticRegressionwithSGD
#Use model to create output
#model.predict().collect() # in "predict" method we have to pass an array
#Read Test data
Testdata = sc.textFile("/home/ayush/Data /Data for Machine Learning/UCI Adult Data Set/UCI adult.test")
parsedTestData = Testdata.map(parse.parsePoint)
#predict result for each Test Data
# Evaluating the model on training data
labelsAndPreds = parsedTestData.map(lambda p: (p.label, model.predict(p.features))) #Taking each array of the RDD of parsedTestData which is a tuple(LabeledPoint) and then calculating its label and features , p is an input to lambda function and p is a tuple point(a LabeledPoint)
millis2 = int(round(time.time() * 1000))
print labelsAndPreds.collect()
#Print testing Error
# 17 3.0 14075 0.042509
# 18 2.0 16520 0.049893
# 19 1.0 32130 0.097037
# 20 0.0 186485 0.563212
# Genre_Name|label| raw_Features|
#Create labeledPoints from a Spark DataFrame using Pyspark
training = training_random.rdd.map(lambda row: LabeledPoint(row['label'], row['raw_Features'].toArray()))
test = test_random.rdd.map(lambda row: LabeledPoint(row['label'], row['raw_Features'].toArray()))
#label features
#========LogisticRegressionModel
# Run training algorithm to build the model
#lr_model = LogisticRegressionWithSGD.train(sc.parallelize(training), validateData=False)
lr_model = LogisticRegressionWithSGD.train(training, validateData=False)
# Compute raw scores on the test set
predictionAndLabels = test.map(lambda lp: (float(lr_model.predict(lp.features)), lp.label))
# Instantiate metrics object
metrics = MulticlassMetrics(predictionAndLabels)
metrics.confusionMatrix().toArray()
#Overall statistics
print("Recall = %s" % metrics.recall())
print("Precision = %s" % metrics.precision())
print("F1 measure = %s" % metrics.fMeasure())
print("Accuracy = %s" % metrics.accuracy)
# Recall = 0.09641896742635338
# Precision = 0.09641896742635338
print(BASE_DATA_PATH)
conf = (SparkConf().setMaster("local[2]").setAppName("Testing MLLib With DataFrame SQL"))
sc = SparkContext(conf=conf)
sqlContext = SQLContext(sc)
# read the dataset
df_test = sqlContext.read.format("com.databricks.spark.csv").options(delimiter=",").options(header="true").load(
BASE_DATA_PATH + '/test.csv')
training = df_test.map(lambda row: LabeledPoint(row.IsClick,
[float(row.SearchID), float(row.AdID), float(row.Position),
float(row.HistCTR), float(row.Price)]))
(trainingData, testData) = training.randomSplit([0.7, 0.3])
model = LogisticRegressionWithSGD.train(trainingData,iterations = 100,step=0.4)
# Build the model
model1 = SVMWithSGD.train(trainingData, iterations=100)
# Evaluate the model on training data
model2 = RandomForest.trainClassifier(trainingData, numClasses=2,
categoricalFeaturesInfo={},
numTrees=3, featureSubsetStrategy="auto",
OHEValidationData = rawValidationData.map(lambda point: parseOHEPoint(
point, ctrOHEDict, numCtrOHEFeats)) ##create validation labeled points
OHEValidationData.cache()
# running first model with fixed hyperparameters
numIters = 50
stepSize = 10.
regParam = 1e-6
regType = 'l2'
includeIntercept = True
print "-------------logistic regression with gradient descent---------"
model0 = LogisticRegressionWithSGD.train(
data=OHETrainData,
iterations=numIters,
step=stepSize,
regParam=regParam,
regType=regType,
intercept=includeIntercept) ##train model
sortedWeights = sorted(model0.weights)
print "------------/logistic regression with gradient descent---------"
def computeLogLoss(p, y):
epsilon = 10e-12
if (p == 0):
p = p + epsilon
elif (p == 1):
p = p - epsilon
.map(lambda lp: len(lp.features.indices))
.sum())
Test.assertEquals(numNZVal, 372080, 'incorrect number of features')
# CTR预估和对数损失函数评估，引用MLlib API
from pyspark.mllib.classification import LogisticRegressionWithSGD
numIters = 50
stepSize = 10.
regParam = 1e-6
regType = 'l2'
includeIntercept = True
model0 = LogisticRegressionWithSGD.train(OHETrainData,iterations=numIters,step=stepSize,regParam=regParam,regType=regType,intercept=includeIntercept)
sortedWeights = sorted(model0.weights)
print sortedWeights[:5], model0.intercept
Test.assertTrue(np.allclose(model0.intercept, 0.56455084025), 'incorrect value for model0.intercept')
Test.assertTrue(np.allclose(sortedWeights[0:5],
[-0.45899236853575609, -0.37973707648623956, -0.36996558266753304,
-0.36934962879928263, -0.32697945415010637]), 'incorrect value for model0.weights')
# log损失
from math import log
def computeLogLoss(p, y):
epsilon = 10e-12
if y == 1 :
from __future__ import print_function
import sys
from pyspark import SparkContext
from pyspark.mllib.regression import LabeledPoint
from pyspark.mllib.classification import LogisticRegressionWithSGD
def parsePoint(line):
"""
Parse a line of text into an MLlib LabeledPoint object.
"""
values = [float(s) for s in line.split(' ')]
if values[0] == -1: # Convert -1 labels to 0 for MLlib
values[0] = 0
return LabeledPoint(values[0], values[1:])
if __name__ == "__main__":
if len(sys.argv) != 3:
print("Usage: logistic_regression <file> <iterations>", file=sys.stderr)
exit(-1)
sc = SparkContext(appName="PythonLR")
points = sc.textFile(sys.argv[1]).map(parsePoint)
iterations = int(sys.argv[2])
model = LogisticRegressionWithSGD.train(points, iterations)
print("Final weights: " + str(model.weights))
print("Final intercept: " + str(model.intercept))
sc.stop()
OHETrainData = rawTrainData.map(lambda point: parseOHEPoint(point, ctrOHEDict, numCtrOHEFeats)) ##create train labeled points
OHETrainData.cache() ##cache
OHEValidationData = rawValidationData.map(lambda point: parseOHEPoint(point, ctrOHEDict, numCtrOHEFeats)) ##create validation labeled points
OHEValidationData.cache()
# running first model with fixed hyperparameters
numIters = 50
stepSize = 10.
regParam = 1e-6
regType = 'l2'
includeIntercept = True
print "-------------logistic regression with gradient descent---------"
model0 = LogisticRegressionWithSGD.train(data=OHETrainData, iterations=numIters, step=stepSize,regParam=regParam, regType=regType, intercept=includeIntercept) ##train model
sortedWeights = sorted(model0.weights)
print "------------/logistic regression with gradient descent---------"
def computeLogLoss(p, y):
epsilon = 10e-12
if (p==0):
p = p + epsilon
elif (p==1):
p = p - epsilon
if y == 1:
z = -log(p)
elif y == 0:
cutoff = float(nrock) / (nrock + nxrock) # recombine equalSampleData = labeledRock.union(labeledNotRock) equalSampleData = labeledData.filter(lambda p: random.random() < cutoff if p.label != 1.0 else True) # split data trainData, testData = randomSplit(equalSampleData, [0.9, 0.1]) trainData.map(lambda p: (p.label, p.features)).take(3) # train model model = LogisticRegressionWithSGD.train(trainData, intercept=False, iterations=10000) # model = LinearRegressionWithSGD.train(trainData, step = 0.1, iterations=1000) # model = SVMWithSGD.train(trainData, step=1, iterations=1000, intercept=True) # evaluate model # labelsAndPreds = testData.map(lambda p: (p.label, 1 if model.predict(p.features) > 0.5 else 0)) labelsAndPreds = testData.map(lambda p: (p.label, model.predict(p.features))) accuracy = labelsAndPreds.filter(lambda (v, p): v == p).count() / float(testData.count()) guess1 = labelsAndPreds.filter(lambda (v, p): p == 1) precision1 = guess1.filter(lambda (v, p): v == p).count() / float(guess1.count()) act1 = labelsAndPreds.filter(lambda (v, p): v == 1) recall1 = act1.filter(lambda (v, p): v == p).count() / float(act1.count())
def main():
appName = "BadOrGood;zl"
conf = (SparkConf()
.setAppName(appName)
.set("spark.executor.memory", "5g")
.set("spark.executor.cores","3")
.set("spark.executor.instance", "3")
)
sc = SparkContext(conf = conf)
hc = HiveContext(sc)
#fetch data
#filepath = '/sshomework_zl/BadOrGood/AllDataRowrdd'
#fetchDataToFile(hc, filepath)
#load data
# AllDataRawrdd = sc.pickleFile(filepath) \
# .map( lambda _: {'label':int(_.status), 'feature':extractFeature(_)} ) \
# .repartition(10)
AllDataRawrdd = sc.pickleFile('/pickleData').repartition(10)
#standardizer for train and test data
model = StandardScaler(True, True) \
.fit( AllDataRawrdd \
.map( lambda _: Vectors.dense(_['feature']) )
)
labels = AllDataRawrdd.map(lambda _: _['label'])
featureTransformed = model.transform( AllDataRawrdd.map(lambda _: _['feature']) )
AllDataRawrdd = labels \
.zip(featureTransformed) \
.map( lambda _: { 'label':_[0], 'feature':_[1] } )
#sampling
trainDataRawrdd, testDataRawrdd = AllDataRawrdd.randomSplit(weights=[0.7, 0.3], seed=100)
trainDatardd = trainDataRawrdd.map( lambda _: LabeledPoint( _['label'], _['feature'] ) ).persist()
testDatardd = testDataRawrdd.map( lambda _: {'label': _['label'], 'feature': list(_['feature']) } ).persist()
#prediction & test
lrmLBFGS = LogisticRegressionWithLBFGS.train(trainDatardd, iterations=3000, regParam=0.01, regType="l1")
resultrdd = test(lrmLBFGS, testDatardd)
lrmLBFGSFone = fone(resultrdd)
lrmLBFGSac = accuracy(resultrdd)
lrmSGD = LogisticRegressionWithSGD.train(trainDatardd, iterations=3000, step=0.1, regParam=0.01, regType="l1")
resultrdd = test(lrmSGD, testDatardd)
lrmSGDFone = fone(resultrdd)
lrmSGDac = accuracy(resultrdd)
dt = DecisionTree.trainClassifier(trainDatardd, 2, {}, maxDepth=10)
resultrdd = test(dt, testDatardd)
dtFone = fone(resultrdd)
dtac = accuracy(resultrdd)
rf = RandomForest.trainClassifier(trainDatardd, 2, {}, 10)
resultrdd = test(rf, testDatardd)
rfFone = fone(resultrdd)
rfac = accuracy(resultrdd)
print "LR_LBFGS f1 is : %f, ac is : %f" % (lrmLBFGSFone, lrmLBFGSac)
print "LR_SGD f1 is : %f, ac is : %f" % (lrmSGDFone, lrmSGDac)
print "Decision Tree f1 is: %f, ac is : %f" % (dtFone, dtac)
print "Random Forest f1 is: %f, ac is : %f" % (rfFone, rfac)
print lrmLBFGS.weights
print lrmSGD.weights
sc.stop()
label = int(trimmed[-1])
features = [convert_na_nb(r) for r in trimmed[4:-1]]
return LabeledPoint(label, Vectors.dense(features))
data = records.map(dealwith)
total_count = data.count()
#为了朴素贝叶斯
nbdata = records.map(dealwithNB)
#print data.first()
numIterations = 10
maxTreeDepth = 5
#训练逻辑回归模型
lrModel = LogisticRegressionWithSGD.train(data, numIterations)
#训练支持向量机模型
svmModel = SVMWithSGD.train(data, numIterations)
#训练朴素贝叶斯模型
nbModel = NaiveBayes.train(nbdata)
#训练决策树模型
#dtModel=DecisionTree.train(data, Algo.Classification, Entropy, maxDepth)
dtModel = DecisionTree.trainClassifier(data,
numClasses=2,
categoricalFeaturesInfo={},
impurity='entropy',
maxDepth=maxTreeDepth,
maxBins=32)
return log_loss
# In[10]:
# try fixed hyperparameters
numIters = 500
stepSize = 1
regParam = 1e-6
regType = 'l2'
includeIntercept = True
model0 = LogisticRegressionWithSGD.train(rawTrainData,
iterations=numIters,
step=stepSize,
miniBatchFraction=1.0,
initialWeights=None,
regParam=regParam,
regType=regType,
intercept=includeIntercept)
print model0.weights, model0.intercept
# In[11]:
classOneFracTrain = (rawTrainData.map(lambda x: x.label)
.reduce(lambda x, y: x+y))/rawTrainData.count()
print classOneFracTrain
logLossTrBase = (rawTrainData.map(lambda x: x.label)
.map(lambda x: computeLogLoss(classOneFracTrain, x))
.reduce(lambda x, y: x+y))/rawTrainData.count()
def train_logistic_regression(trainRDD):
return LogisticRegressionWithSGD.train(trainRDD, iterations=10)
def train(self, num_iterations=10):
model = LogisticRegressionWithSGD.train(
self._labeled_feature_vector_rdd(),
num_iterations)
return LogisticRegressionModel(model, self.feature_cols)
hashValidationData.cache()
hashTestData = rawTestData.map(lambda x: parseHashPoint(x, numBucketsCTR))
hashTestData.cache()
# ===================================================
# train logistic regression model
# ===================================================
numIters = 100
stepSize = 10.
regParam = 0. # no regularization
regType = 'l2'
includeIntercept = True
model = LogisticRegressionWithSGD.train(hashTrainData,
iterations=numIters,
step=stepSize,
regParam=regParam,
regType=regType,
intercept=includeIntercept)
sortedWeights = sorted(model.weights)
sys.stderr.write('\n Model Intercept: {0}'.format(model.intercept))
sys.stderr.write('\n Model Weights (Top 5): {0}\n'.format(
sortedWeights[:5]))
l_metrics = []
l_metrics.append(evaluateMetrics(model, hashTrainData, 'TRAIN'))
l_metrics.append(evaluateMetrics(model, hashValidationData, 'VALIDATE'))
l_metrics.append(evaluateMetrics(model, hashTestData, 'TEST'))
sc.parallelize(l_metrics).saveAsTextFile(sys.argv[4])
def create_model(self, data, params):
numIterations = int(params.get('numIterations', 10))
points = data.map(self.parsePoint)
return LogisticRegressionWithSGD.train(points, numIterations)
return None
#set hdfs path
#data = sc.sequenceFile("hdfs://nameservice1/user/geap/warehouse/camus/etl/rat/hourly/2015/06/01/00/*")
data = sc.textFile(
"hdfs://nameservice1/user/geap/warehouse/geap.db/user_hist_plain/year=2015/*/*/*/*"
)
parsedData = data.filter(filterPoint).map(parsePoint).filter(
lambda kv: kv != None).reduceByKey(lambda x, y: x + y).map(
lambda (k, v): list(set(v)))
parsedData.cache()
#Calculate total number of columns in the dataset
column_num = parsedData.flatMap(lambda _: _).distinct().count()
column_id = parsedData.flatMap(lambda _: _).distinct().collect()
column_id.sort()
#choose a genre to test, default is 100th column as target variable
genre = 1
sortedData = parsedData.map(sortPoint).filter(lambda p: p != None)
labeledData = sortedData.map(lambda line: (line, genre)).map(labelData).filter(
lambda p: p != None)
LRSGDmodel = LogisticRegressionWithSGD.train(labeledData)
print LRSGDmodel.weights
def anom_with_lr():
try:
plaintext_rdd = sc.textFile("file:///Users/blahiri/healthcare/data/cloudera_challenge/pat_proc_larger.csv") #69.2 MB
pat_proc = pycsv.csvToDataFrame(sqlContext, plaintext_rdd, sep = ",")
anom = pat_proc.filter(pat_proc.is_anomalous == 1)
benign = pat_proc.filter(pat_proc.is_anomalous == 0)
n_benign = benign.count()
#Take a random sample of 50K from the unlabeled 100K
sqlContext.registerFunction("my_random", lambda x: x - x + random())
sqlContext.registerDataFrameAsTable(benign, "benign")
benign = sqlContext.sql("SELECT *, my_random(is_anomalous) as random_number FROM benign")
threshold = 50000/n_benign
into_model = benign.filter(benign.random_number <= threshold)
for_finding_more = benign.filter(benign.random_number > threshold)
for_modeling = anom.unionAll(into_model.drop(into_model.random_number))
for_finding_more = for_finding_more.drop(for_finding_more.random_number)
#Try to pull this from a much larger sample, or, the entire data, because the ones with lowest probabilities, among
#the selected 10,000, have probabilities around 0.05
print("anom.count() = " + str(anom.count()) + ", benign.count() = " + str(benign.count()) + ", into_model.count() = " + str(into_model.count())
+ ", for_modeling.count() = " + str(for_modeling.count()) + ", for_finding_more.count() = " + str(for_finding_more.count()))
all_columns = for_modeling.columns
features = [x for x in all_columns if (x not in ["patient_id", "is_anomalous"])]
categorical_features = ["age_group", "gender", "income_range"] #We are listing these 3 as categorical features only as the procedure features have 0-1 values anyway
procedure_features = [x for x in features if (x not in categorical_features)]
#Unlike decision tree, logistic regression does not need the map categoricalFeaturesInfo, just an RDD of LabeledPoint objects.
#Create a dictionary where the key-value pairs are as follows: key is the name of the categorical feature, and value is a list with the following entries:
#1) an id of the feature that is incremented sequentially, 2) no. of distinct values of the feature, 3) a list of the distinct values of the feature.
cat_feature_number = 0
dict_cat_features = {}
for feature in categorical_features:
agvalues = pat_proc.select(pat_proc[feature].cast("string").alias("feature")).distinct().collect()
distinct_values = map(lambda row: row.asDict().values()[0], agvalues)
distinct_values = sorted(map(lambda unicode_val: unicode_val.encode('ascii','ignore'), distinct_values))
dict_cat_features[feature] = [cat_feature_number, len(distinct_values), distinct_values]
cat_feature_number += 1
for_modeling = for_modeling.rdd
print("for_modeling.getNumPartitions() = " + str(for_modeling.getNumPartitions())) #4 partitions: the default should be the number of logical cores, which is 8
(train, test) = for_modeling.randomSplit([0.5, 0.5])
test_data_size = test.count()
print("train.count() = " + str(train.count()) + ", test.count() = " + str(test_data_size))
training_data = train.map(lambda x: create_labeled_point(x, features, categorical_features, dict_cat_features, procedure_features))
print("training_data.count() = " + str(training_data.count()))
t0 = time()
#model = LogisticRegressionWithLBFGS.train(training_data) #LBFGS took 66.766 seconds
model = LogisticRegressionWithSGD.train(training_data) #SGCD took 69.261 seconds
tt = time() - t0
print "Classifier trained in {} seconds".format(round(tt,3))
test_data = test.map(lambda x: create_labeled_point(x, features, categorical_features, dict_cat_features, procedure_features))
t0 = time()
predictions = model.predict(test_data.map(lambda p: p.features))
tt = time() - t0
print "Prediction made in {} seconds".format(round(tt,3)) #Reports as 0.0 seconds
labelsAndPreds = test_data.map(lambda p: (p.label, model.predict(p.features)))
test_accuracy = labelsAndPreds.filter(lambda (v, p): v == p).count()/float(test_data_size)
fpr = labelsAndPreds.filter(lambda (v, p): (v == 0 and p == 1)).count()/labelsAndPreds.filter(lambda (v, p): v == 0).count()
fnr = labelsAndPreds.filter(lambda (v, p): (v == 1 and p == 0)).count()/labelsAndPreds.filter(lambda (v, p): v == 1).count()
print "Test accuracy is {}, fpr is {}, fnr is {}".format(round(test_accuracy, 4), round(fpr, 4), round(fnr, 4)) #Test accuracy is 0.9057, fpr is 0.1634, fnr is 0.0282
model.clearThreshold()
for_finding_more = for_finding_more.map(lambda x: create_labeled_point(x, features, categorical_features, dict_cat_features, procedure_features)) #OK
for_finding_more = for_finding_more.map(lambda p: (p.features, model.predict(p.features), p.label)) #OK
try:
for_finding_more.first() #We perform an action here because otherwise the output will be a PipelinedRDD.
#Reverse-sort the additional patients by their predicted probabilities of being anomalous and take the top 10,000
#for_finding_more.take(5)
except EOFError:
print("EOF handled")
df = sqlContext.createDataFrame(for_finding_more.collect(), ['features', 'predicted_prob', 'is_anom'])
df = df.orderBy(df.predicted_prob.desc()) #The orderBy is not actually called if collect() is not called. Can be also triggered by calling take(). We are triggering it by the writing in the next statement.
df.select('is_anom', 'predicted_prob').limit(10000).write.format('com.databricks.spark.csv').save('file:///Users/blahiri/healthcare/data/cloudera_challenge/additional_10000_from_spark.csv') #Top one has
#probability of 0.86818, last one has probability 0.5928958
except Exception:
print("Exception in user code:")
traceback.print_exc(file = sys.stdout)
return for_finding_more
pos_file = "data/training_positif_clean.csv"
neg_file = "data/training_negatif_clean.csv"
training_idf = training_set(pos_file, neg_file)
training = training_idf[0]
idf = training_idf[1]
test_file = "data/test_clean" + str(part) + ".csv"
test = test_set(test_file, idf)
print("\nDone : Tf-IDF training and test sets")
###########################################################################
######### Model Training #########
model_regression = LogisticRegressionWithSGD.train(training)
print("Done : regression training ")
###########################################################################
######### Model Testing #########
#regression
predictions_regression = model_regression.predict(test)
num_pos_regression = predictions_regression.countByValue()[1.0]
num_neg_regression = predictions_regression.countByValue()[0.0]
print("\n== PREDICTION REGRESSION : ==\n")
print("- Positive : ", num_pos_regression)
print("- Negative : ", num_neg_regression)
file.write(
# 6. Create LabeledPoint datasets for positive (spam) and negative (ham) examples. A LabeledPoint consists simply of a label and a features vector.
positive_examples = spam_features.map(
lambda features: LabeledPoint(1, features))
negative_examples = ham_features.map(
lambda features: LabeledPoint(0, features))
# 7. Create training data and cache it since Logistic Regression is an iterative algorithm. Examine the training data with collect action.
training_data = positive_examples.union(negative_examples)
training_data.cache()
training_data.collect()
# 8. Run Logistic Regression using the SGD optimizer and then check the model contents.
model = LogisticRegressionWithSGD.train(training_data)
model
# 9. Test on a positive example (which is a spam) and a negative one (which is a ham). Apply the same HashingTF feature transformation algorithm used on the training data.
pos_example = tf.transform("No investment required".split(" "))
neg_example = tf.transform(
"Data Science courses recommended for you".split(" "))
# 10. Now use the learned model to predict spam/ham for new emails.
print "Prediction for positive test: %g" % model.predict(pos_example)
# Prediction for positive test: 1
print "Prediction for negative test: %g" % model.predict(neg_example)
# Prediction for negative test: 0
train_data_formatted = train_data.map(create_labeled_point)
# Obtengo el minimo de cada feature para sumarlo
train_min_feat = train_data_formatted.map(lambda x: x.features).reduce(
lambda a, b: np.minimum(a, b))
# resto el minimo para tener todos feats positivos (+0)
train_data_formatted_pos = train_data_formatted.map(
lambda x: LabeledPoint(x.label, x.features - train_min_feat))
# Clasificacion usando dos modelos
from pyspark.mllib.classification import NaiveBayes
from pyspark.mllib.classification import LogisticRegressionWithSGD
modelNB = NaiveBayes.train(train_data_formatted_pos)
modelLR = LogisticRegressionWithSGD.train(train_data_formatted_pos)
# Leo datos de test
test_full = sc.textFile('file:///home/cloudera/bank-additional.csv')
test_data_raw = test_full.filter(lambda row: row != train_header)
test_data = test_data_raw.map(lambda line: line.replace('"', '').replace(
'\n', '').replace('\r', '').split(';'))
test_data = test_data.filter(lambda vec: len(vec) == 21)
test_data_formatted = test_data.map(create_labeled_point)
test_data_features = test_data_formatted.map(
lambda x: x.features - train_min_feat)
test_data_true_label = test_data_formatted.map(lambda x: x.label).collect()
print test_data_true_label[:100]
table1 = sc.textFile("/user/team322/junli_testFeature/*")
def f1(line):
line = str(line).replace('(','').replace(')','').replace('None','0')
userID = line.split(',')[0]
return userID
user = table1.map(f1).collect() #select the users of validation data
result6 = sc.textFile("/user/team322/junli_trainFeature/*")
# Load and parse the data
def parsePoint(line):
line = str(line).replace('(','').replace(')','').replace('None','0')
line = line.split(',')
values = [float(x) for x in line[2:]] #select label Column and features Columns
return LabeledPoint(values[0], values[1:])
parsedData = result6.map(parsePoint)
# Build the model
model = LogisticRegressionWithSGD.train(parsedData)
result7 = sc.textFile("/user/team322/junli_testFeature/*")
def testParsePoint(line):
line = str(line).replace('(','').replace(')','').replace('None','0')
line = line.split(',')
values = [float(x) for x in line[1:]] #select label Column and features Columns
return LabeledPoint(values[0], values[1:])
parsedData2 = result7.map(testParsePoint)
preds = parsedData2.map(lambda p: model.predict(p.features)) #use the model to predict parsedData2
preds = preds.collect() #translate the result of predict into list
userID = []
for i in xrange(len(preds)): #select users whose predict is 1
if preds[i] == 1:
userID.append(user[i])
sc.parallelize(userID).saveAsTextFile('/user/team322/solution_v') #create a parallelized collection and save it
t2 = time.ctime()
def test_classification(self):
from pyspark.mllib.classification import LogisticRegressionWithSGD, SVMWithSGD, NaiveBayes
from pyspark.mllib.tree import DecisionTree, DecisionTreeModel, RandomForest, \
RandomForestModel, GradientBoostedTrees, GradientBoostedTreesModel
data = [
LabeledPoint(0.0, [1, 0, 0]),
LabeledPoint(1.0, [0, 1, 1]),
LabeledPoint(0.0, [2, 0, 0]),
LabeledPoint(1.0, [0, 2, 1])
]
rdd = self.sc.parallelize(data)
features = [p.features.tolist() for p in data]
temp_dir = tempfile.mkdtemp()
lr_model = LogisticRegressionWithSGD.train(rdd, iterations=10)
self.assertTrue(lr_model.predict(features[0]) <= 0)
self.assertTrue(lr_model.predict(features[1]) > 0)
self.assertTrue(lr_model.predict(features[2]) <= 0)
self.assertTrue(lr_model.predict(features[3]) > 0)
svm_model = SVMWithSGD.train(rdd, iterations=10)
self.assertTrue(svm_model.predict(features[0]) <= 0)
self.assertTrue(svm_model.predict(features[1]) > 0)
self.assertTrue(svm_model.predict(features[2]) <= 0)
self.assertTrue(svm_model.predict(features[3]) > 0)
nb_model = NaiveBayes.train(rdd)
self.assertTrue(nb_model.predict(features[0]) <= 0)
self.assertTrue(nb_model.predict(features[1]) > 0)
self.assertTrue(nb_model.predict(features[2]) <= 0)
self.assertTrue(nb_model.predict(features[3]) > 0)
categoricalFeaturesInfo = {0: 3} # feature 0 has 3 categories
dt_model = DecisionTree.trainClassifier(
rdd,
numClasses=2,
categoricalFeaturesInfo=categoricalFeaturesInfo,
maxBins=4)
self.assertTrue(dt_model.predict(features[0]) <= 0)
self.assertTrue(dt_model.predict(features[1]) > 0)
self.assertTrue(dt_model.predict(features[2]) <= 0)
self.assertTrue(dt_model.predict(features[3]) > 0)
dt_model_dir = os.path.join(temp_dir, "dt")
dt_model.save(self.sc, dt_model_dir)
same_dt_model = DecisionTreeModel.load(self.sc, dt_model_dir)
self.assertEqual(same_dt_model.toDebugString(),
dt_model.toDebugString())
rf_model = RandomForest.trainClassifier(
rdd,
numClasses=2,
categoricalFeaturesInfo=categoricalFeaturesInfo,
numTrees=10,
maxBins=4,
seed=1)
self.assertTrue(rf_model.predict(features[0]) <= 0)
self.assertTrue(rf_model.predict(features[1]) > 0)
self.assertTrue(rf_model.predict(features[2]) <= 0)
self.assertTrue(rf_model.predict(features[3]) > 0)
rf_model_dir = os.path.join(temp_dir, "rf")
rf_model.save(self.sc, rf_model_dir)
same_rf_model = RandomForestModel.load(self.sc, rf_model_dir)
self.assertEqual(same_rf_model.toDebugString(),
rf_model.toDebugString())
gbt_model = GradientBoostedTrees.trainClassifier(
rdd,
categoricalFeaturesInfo=categoricalFeaturesInfo,
numIterations=4)
self.assertTrue(gbt_model.predict(features[0]) <= 0)
self.assertTrue(gbt_model.predict(features[1]) > 0)
self.assertTrue(gbt_model.predict(features[2]) <= 0)
self.assertTrue(gbt_model.predict(features[3]) > 0)
gbt_model_dir = os.path.join(temp_dir, "gbt")
gbt_model.save(self.sc, gbt_model_dir)
same_gbt_model = GradientBoostedTreesModel.load(self.sc, gbt_model_dir)
self.assertEqual(same_gbt_model.toDebugString(),
gbt_model.toDebugString())
try:
rmtree(temp_dir)
except OSError:
pass