def main():
if len(sys.argv) != 2:
print("parameter error")
sys.exit(1)
arg = json.loads(sys.argv[1])
spark = SparkSession.builder \
.appName("spark_lr") \
.enableHiveSupport() \
.getOrCreate()
scene = arg["scene"]
version = arg["version"]
model = arg["model"]
sample_path = arg["sample-path"]
num_features = arg["num-features"]
num_classes = arg["num-classes"]
train_file = sample_path.replace(
"{scene}.{model}.{version}.[train|test]",
"%s.%s.%s.train" % (scene, model, version))
test_file = sample_path.replace("{scene}.{model}.{version}.[train|test]",
"%s.%s.%s.test" % (scene, model, version))
train = MLUtils.loadLibSVMFile(spark.sparkContext, train_file,
num_features)
test = MLUtils.loadLibSVMFile(spark.sparkContext, test_file, num_features)
print(train.count())
print(test.count())
print(train.getNumPartitions())
print(test.getNumPartitions())
def main(sc, sql_context, is_hive=True):
lp_train = MLUtils.loadLabeledPoints(sc,
"bintrade.ml.diff.label_point.train")
lp_check = MLUtils.loadLabeledPoints(sc,
"bintrade.ml.diff.label_point.check")
model = GradientBoostedTrees.trainRegressor(lp_train, {},
numIterations=50,
maxDepth=10)
preds = model.predict(lp_check.map(lambda x: x.features))
labels_and_preds = lp_check.map(lambda x: x.label).zip(preds).sortBy(
lambda x: x[1], ascending=False)
for each in labels_and_preds.take(100):
print each
labels_and_preds = lp_check.map(lambda x: x.label).zip(preds).sortBy(
lambda x: x[1], ascending=True)
for each in labels_and_preds.take(100):
print each
mse = labels_and_preds.map(
lambda x: math.pow(x[0] - x[1], 2)).sum() / labels_and_preds.count()
print mse
mse = labels_and_preds.map(
lambda x: math.pow(x[0] - 1.0, 2)).sum() / labels_and_preds.count()
print mse
def create_vector_file(pitch_outcome, path, folder):
from pyspark.mllib.regression import LabeledPoint
from pyspark.mllib.util import MLUtils
pitch_o_RDD = pitch_outcome.rdd
x = pitch_o_RDD.map(lambda data: LabeledPoint(data[13],[data[0],data[1],data[2],data[3],\
data[4],data[5],data[6],data[7],data[8],data[9],data[10],data[11],data[12],data[14],\
data[15],data[16],data[17],data[18],data[19],data[20]]))
MLUtils.saveAsLibSVMFile(x, path + folder)
def cross_validation_task_C(X,
estimator,
sqlContext,
class_type,
features_col,
sc,
k_folds=10):
kf = KFold(n_splits=k_folds)
maem = []
maeni = []
for train_index, test_index in kf.split(X):
sparse_data = []
test_data = []
cl_cl = []
X_train, X_test = X.iloc[train_index], X.iloc[test_index]
train_topic = sqlContext.createDataFrame(X_train)
test_topic = sqlContext.createDataFrame(X_test)
# True: DecisionTree
# False: NaiveBayes
if (class_type):
pred = pd.DataFrame(columns=['class', 'prediction'])
train_topic = MLUtils.convertVectorColumnsFromML(
train_topic, features_col)
test_topic = MLUtils.convertVectorColumnsFromML(
test_topic, features_col)
for index, row in train_topic.toPandas().iterrows():
sparse_data.append(
LabeledPoint(float(row['class']), row[features_col]))
for index, row in test_topic.toPandas().iterrows():
cl_cl.append(row['class'])
test_data.append(row[features_col])
model = DecisionTree.trainClassifier(sc.parallelize(sparse_data),
5, {})
pred['class'] = cl_cl
pred['prediction'] = model.predict(
sc.parallelize(test_data)).collect()
maem_aux, maeni_aux = mae_ms(pred)
else:
pred = estimator.fit(train_topic).transform(test_topic).select(
'class', 'prediction').toPandas()
maem_aux, maeni_aux = mae_ms(pred)
maem.append(maem_aux)
maeni.append(maeni_aux)
return (np.mean(maem), np.mean(maeni))
def write_rdd(rdd, path, out_type = 'pickleFile', db_path = None, db_fields = {}) :
"""
Write an RDD to disk with a given output type and optionally adding an entry to an RDD metadata database.
**Input**
*rdd* : the rdd to write to disk
*path* : absolute path for the output
**Optional Keywords**
*out_type* : which type of Spark output to create
*db_path* : if you want to add the entries to a database, add the path here
*db_fields* : if you specify a *db_path* you must also specify a dictionary of database fields and their values
"""
if out_type == 'pickleFile' :
rdd.saveAsPickleFile(path)
elif out_type == 'textFile' :
rdd.saveAsTextFile(path)
elif out_type == 'libsvm' :
from pyspark.mllib.util import MLUtils
MLUtils.saveAsLibSVMFile(rdd, path)
else :
raise RuntimeError("out_type must be either 'pickleFile' or 'textFile'")
if db_path is not None :
# open the database connection -- if the database doesn't exist it will automatically be created
import sqlite3
import time
conn = sqlite3.connect(db_path)
with conn :
c = conn.cursor()
# create the RDDs table if it doesn't exist
c.execute('create TABLE if NOT EXISTS RDDs (path text, date_time text, filter text, description text, script text, year_start INTEGER, year_end INTEGER)')
filter_text = db_fields.get('filter', '')
description_text = db_fields.get('description', '')
script_text = db_fields.get('script', '')
year_start = db_fields.get('year_start', 0)
year_end = db_fields.get('year_end', 0)
# form data tuple
date = time.localtime()
date_string = '%s-%02d-%02d_%02d:%02d:%02d'%(date.tm_year, int(date.tm_mon), int(date.tm_mday),
int(date.tm_hour), int(date.tm_min), int(date.tm_sec))
data = (path, date_string, filter_text, description_text, script_text, year_start, year_end)
c.execute('INSERT INTO RDDs VALUES (?,?,?,?,?,?,?)', data)
def random_forest():
conf = SparkConf().setAppName('RF')
sc = SparkContext(conf=conf)
# print("\npyspark version:" + str(sc.version) + "\n")
data = MLUtils.loadLibSVMFile(sc, './data/sample_libsvm_data.txt')
(trainingData, testData) = data.randomSplit([0.7, 0.3])
model = RandomForest.trainClassifier(trainingData,
numClasses=2,
categoricalFeaturesInfo={},
numTrees=3,
featureSubsetStrategy="auto",
impurity='gini',
maxDepth=4,
maxBins=32)
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testErr = labelsAndPredictions.filter(lambda v, p: v != p).count() / float(
testData.count())
print('Test Error = ' + str(testErr))
print('Learned classification forest model:')
print(model.toDebugString())
# Save and load model
model.save(sc, ".model/myRandomForestClassificationModel")
sameModel = RandomForestModel.load(
sc, "./model/myRandomForestClassificationModel")
def prediction(model_directory, libsvm_file, outputfile):
sc = SparkContext(appName="PythonLinearRegressionWithSGDExample")
model = LogisticRegressionModel.load(sc, model_directory)
#print "numfeature",model.numFeatures
#print "aaaaaaaa"
vectors = MLUtils.loadLibSVMFile(sc,
libsvm_file,
numFeatures=model.numFeatures)
vectors.cache()
model.clearThreshold()
# vector = vectors.collect()
# for v in vector:
#
# features = v.features
# print features
# print "bbbb",len(features),model.predict(Vectors.dense(features))
# exit()
scores = vectors.map(lambda p: (model.predict(Vectors.dense(p.features))))
# lambda p: (p.label, model.predict(p.features)))
scores_list = scores.collect()
file_out_obj = open(outputfile, 'w')
for score in scores_list:
#print '----->',score
file_out_obj.write(str(score) + '\n')
file_out_obj.close()
def train():
data = MLUtils.loadLibSVMFile(sc, TEST_DATA_PATH)
print("[INFO] load complete.")
# 划分训练集
data = data.randomSplit([0.2, 0.8])[0]
(trainingData, testData) = data.randomSplit([0.7, 0.3])
# Train a RandomForest model.
# Empty categoricalFeaturesInfo indicates all features are continuous.
# Note: Use larger numTrees in practice.
# Setting featureSubsetStrategy="auto" lets the algorithm choose.
model = RandomForest.trainClassifier(trainingData,
numClasses=NUM_OF_CLASSES,
categoricalFeaturesInfo={},
numTrees=NUM_OF_TREES,
featureSubsetStrategy="auto",
impurity='gini',
maxDepth=MAXDEPTH,
maxBins=MAXBINS)
# Evaluate model on test instances and compute test error
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testErr = labelsAndPredictions.filter(
lambda lp: lp[0] != lp[1]).count() / float(testData.count())
print('[INFO] Test Error = ' + str(testErr))
print('[INFO] Learned classification forest model:')
print(model.toDebugString())
# Save and load model
model.save(sc, TEST_MODEL_PATH)
sameModel = RandomForestModel.load(sc, TEST_MODEL_PATH)
def test_append_bias_with_sp_vector(self):
data = Vectors.sparse(3, {0: 2.0, 2: 2.0})
expected = Vectors.sparse(4, {0: 2.0, 2: 2.0, 3: 1.0})
# Returned value must be SparseVector
ret = MLUtils.appendBias(data)
self.assertEqual(ret, expected)
self.assertEqual(type(ret), SparseVector)
def split_data():
try:
#pat_proc = sc.textFile("hdfs://master:54310/bibudh/healthcare/data/cloudera_challenge/pat_proc_libsvm_format")
#sqlContext.createDataFrame(pat_proc.map(lambda x: custom_encode(x)).take(10000)).foreach(check_for_ascending)
#map(lambda w: check_for_ascending(w), pat_proc.map(lambda x: custom_encode(x)).take(10000000))
#pat_proc = sqlContext.read.format("libsvm").load(home_folder + '/healthcare/data/cloudera_challenge/pat_proc_libsvm_format/part-*') #This gives a DataFrame
pat_proc = MLUtils.loadLibSVMFile(sc, home_folder + '/healthcare/data/cloudera_challenge/pat_proc_libsvm_format/part-*').toDF() #Naive Bayes expects
#data as an RDD of LabeledPoint
print("pat_proc.count() = " + str(pat_proc.count())) #150,127 rows, the two columns are ['label', 'features']
anom = pat_proc.filter(pat_proc.label == 1) #This can be done since we have called toDF() on output of loadLibSVMFile()
benign = pat_proc.filter(pat_proc.label == 0)
n_benign = benign.count()
#Take a random sample of 50K from benign
frac = 50000/n_benign
(into_model, for_finding_more) = benign.randomSplit([frac, 1 - frac])
print("into_model.count() = " + str(into_model.count()) + ", for_finding_more.count() = " + str(for_finding_more.count()))
for_modeling = anom.unionAll(into_model)
#for_modeling = for_modeling.rdd #LogisticRegressionWithSGD works on RDD of LabeledPoint objects
(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))
ret_obj = {'train': train, 'test': test, 'for_finding_more': for_finding_more}
except Exception:
print("Exception in user code:")
traceback.print_exc(file = sys.stdout)
return ret_obj
def Random_Forest(filename, sc):
filename = "/Users/Jacob/SparkService/data/sample_libsvm_data.txt"
# Load and parse the data file into an RDD of LabeledPoint.
data = MLUtils.loadLibSVMFile(sc, filename)
# Split the data into training and test sets (30% held out for testing)
(trainingData, testData) = data.randomSplit([0.7, 0.3])
# Train a RandomForest model.
# Empty categoricalFeaturesInfo indicates all features are continuous.
# Note: Use larger numTrees in practice.
# Setting featureSubsetStrategy="auto" lets the algorithm choose.
model = RandomForest.trainClassifier(trainingData, numClasses=2, categoricalFeaturesInfo={},
numTrees=3, featureSubsetStrategy="auto",
impurity='gini', maxDepth=4, maxBins=32)
# Evaluate model on test instances and compute test error
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
print('Test Error = ' + str(testErr))
print('Learned classification forest model:')
print(model.toDebugString())
# Save and load model
#model.save(sc, "target/tmp/myRandomForestClassificationModel")
#sameModel = RandomForestModel.load(sc, "target/tmp/myRandomForestClassificationModel")
def test_append_bias_with_sp_vector(self):
data = Vectors.sparse(3, {0: 2.0, 2: 2.0})
expected = Vectors.sparse(4, {0: 2.0, 2: 2.0, 3: 1.0})
# Returned value must be SparseVector
ret = MLUtils.appendBias(data)
self.assertEqual(ret, expected)
self.assertEqual(type(ret), SparseVector)
def predict():
testData = MLUtils.loadLibSVMFile(sc,INPUT_DATA_PATH)
print("[INFO] load complete.")
model = RandomForestModel.load(sc,TEST_MODEL_PATH)
# Evaluate model on test instances and compute test error
predictions = model.predict(testData.map(lambda x: x.features))
lst = predictions.collect()
with open(TEST_PREDICT_PATH+"/"+time.strftime("%Y-%m-%d-%H:%M:%S", time.localtime())+".txt",'w') as f:
for k in lst:
f.write(str(k)+"\n")
labelsAndPredictions = testData.map(lambda lp: tobin(lp.label)).zip(predictions.map(lambda lp: tobin(lp)))
#print(labelsAndPredictions.collect())
metrics = BinaryClassificationMetrics(labelsAndPredictions)
# Area under precision-recall curve
print("Area under PR = %s" % metrics.areaUnderPR)
# Area under ROC curve
print("Area under ROC = %s" % metrics.areaUnderROC)
#print(labelsAndPredictions.collect())
testErr = labelsAndPredictions.filter(lambda lp: lp[0] != lp[1]).count() / float(testData.count())
print('[INFO] Test Error = ' + str(testErr))
def main():
options = parse_args()
sc = SparkContext(appName="PythonRandomForestClassificationExample")
# $example on$
# Load and parse the data file into an RDD of LabeledPoint.
data = MLUtils.loadLibSVMFile(sc, options.data_file)
# Split the data into training and test sets (30% held out for testing)
(trainingData, testData) = data.randomSplit([0.7, 0.3])
# Train a RandomForest model.
# Empty categoricalFeaturesInfo indicates all features are continuous.
# Note: Use larger numTrees in practice.
# Setting featureSubsetStrategy="auto" lets the algorithm choose.
model = RandomForest.trainClassifier(trainingData,
numClasses=2,
categoricalFeaturesInfo={},
numTrees=3,
featureSubsetStrategy="auto",
impurity='gini',
maxDepth=4,
maxBins=32)
# Evaluate model on test instances and compute test error
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testErr = labelsAndPredictions.filter(
lambda lp: lp[0] != lp[1]).count() / float(testData.count())
print('Test Error = ' + str(testErr))
print('Learned classification forest model:')
print(model.toDebugString())
# Save and load model
model.save(sc, options.output_model)
sameModel = RandomForestModel.load(sc, options.output_model)
def _load_data(self, path):
dataset_format = self.job_args.get('dataset_format')
if dataset_format == 'libsvm':
return MLUtils.loadLibSVMFile(self.context, path)
else:
return self.context.textFile(path).cache()
def read_csv(path):
df = spark.read.csv(path, header=True, inferSchema=True)
udf = UserDefinedFunction(lambda x: Vectors.parse(x), VectorUDT())
# https://spark.apache.org/docs/latest/ml-migration-guides.html
new_df = MLUtils.convertVectorColumnsToML(
df.withColumn('features', udf(df.features)))
return new_df
def saveaslibSVMfile(self):
"""
保存libsvm格式的文件
:return:
"""
sc = SparkContext(master="local[2]",
appName="SaveAsLibSVMFile" +
os.path.basename(self.__savepath))
features = sc.textFile(self.__featurespath)
TOTALFEATUREANDLABEL = sc.accumulator([], ListParamForLabeledPoint())
def codechange(line):
"""
根据“_v”切分出类别信息
:param line:关键帧的特征
:return: （类别号，特征）
"""
classname = os.path.basename(line[0]).split("_v")[0]
classnum = self.__classmap[classname]
# ResultIterable = list(line[1])
# features = ResultIterable[0] + ResultIterable[1] + ResultIterable[2]
# print(len(features))
return (classnum, list(line[1]))
def getfeaturesandlabel(line):
"""
返回LabeledPoint类型的标签和特征组合
:param line:（类别号，特征）
:return:返回LabeledPoint类型的标签和特征组合
"""
#global TOTALFEATUREANDLABEL
return LabeledPoint(line[0], Vectors.dense(line[1]))
#TOTALFEATUREANDLABEL += [LabeledPoint(line[0], Vectors.dense(line[1]))]
featuresandlabel = features.map(lambda x: x.split(" ")).map(
lambda x: (x[1], x[2:])).map(codechange).map(
getfeaturesandlabel).repartition(1)
featuresandlabel.count()
print(featuresandlabel.count())
#totalfeatureandlabel = TOTALFEATUREANDLABEL.value
MLUtils.saveAsLibSVMFile(featuresandlabel, self.__savepath)
sc.stop()
def LinearRegression(trainFile, testFile, taskid,sc):
# filename = "/Users/Jacob/repository/SparkService/data/lpsa.data"
# data = sc.textFile(filename)
# parsedData = data.map(parsePoint)
trainData = MLUtils.loadLibSVMFile(sc, trainFile)
testData = MLUtils.loadLibSVMFile(sc, testFile)
# train the model
model = LinearRegressionWithSGD.train(trainData)
# Evaluate the model on training data
# predictionAndLabels = parsedData.map(lambda p: (p.label, model.predict(p.features)))
predictionAndLabels = testData.map(lambda p: (p.label, model.predict(p.features)))
MSE = predictionAndLabels.map(lambda (v, p): (v - p)**2).reduce(lambda x, y: x + y) / predictionAndLabels.count()
print("\n\n\n\n\n\nMean Squared Error = " + str(MSE) + "\n\n\n\n\n")
# Save and load model
#model.save(sc, "myModelPath")
#sameModel = LinearRegressionModel.load(sc, "myModelPath")
def train_model(filename='final_tip_all.txt',
test_portion=0.2,
cat_var=cat_var_dic,
n_tree=250,
mode_feature_strat='auto',
max_deep=5,
max_bin=32):
# Train a RandomForest model.
# Empty categoricalFeaturesInfo indicates all features are continuous.
# Note: Use larger numTrees in practice.
# Setting featureSubsetStrategy="auto" lets the algorithm choose
sc = SparkContext()
sqlContext = SQLContext(sc)
spark = SparkSession.builder.appName("RandomForestRegressor").getOrCreate()
# Load and parse the data file into an RDD of LabeledPoint.
data = MLUtils.loadLibSVMFile(sc, filename)
# Split the data into training and test sets (30% held out for testing)
(trainingData,
testData) = data.randomSplit([1 - test_portion, test_portion])
##### TREAT TEMP AS CONTINUOUS ####
model = RandomForest.trainRegressor(
trainingData,
categoricalFeaturesInfo=cat_var,
numTrees=n_tree,
featureSubsetStrategy=mode_feature_strat,
impurity='variance',
maxDepth=max_deep,
maxBins=max_bin)
############ prediction !!!! ####
# Evaluate model on test instances and compute test error
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testMSE = labelsAndPredictions.map(lambda (v, p): (v - p) *
(v - p)).sum() / float(testData.count())
testRMSE = math.sqrt(testMSE)
#predictions.takeSample(withReplacement = False, num = 5)
# convert the rdd object to dataframe as follows
df_predictions = predictions.map(lambda x: (x, )).toDF()
df_predictions.cache()
#df_predictions.show(5, False)
#print('Learned regression forest model:')
#print(model.toDebugString())
print('Test Root Mean Squared Error on ' + filename + ' = ' +
str(testRMSE))
def npmat_to_rdd_wreadwrite(sc, X, Y, f_name, delete_file=False):
"""
Takes a data prepared for scikit model X in numpy matrix format, Y one-dimensional numpy array
and writes to file in libsvm format with filename string f_name provided (could delete automatically),
then reads from file directly into spark RDD object (for given Sparkcontext sc)
"""
sklearn.datasets.dump_svmlight_file(X, Y, f_name, zero_based=False)
read_rdd = MLUtils.loadLibSVMFile(sc, f_name)
if delete_file:
os.remove(f_name)
return read_rdd
def npmat_to_rdd_wreadwrite(sc,X,Y,f_name,delete_file=False):
"""
Takes a data prepared for scikit model X in numpy matrix format, Y one-dimensional numpy array
and writes to file in libsvm format with filename string f_name provided (could delete automatically),
then reads from file directly into spark RDD object (for given Sparkcontext sc)
"""
sklearn.datasets.dump_svmlight_file(X,Y,f_name,zero_based=False)
read_rdd= MLUtils.loadLibSVMFile(sc, f_name)
if delete_file:
os.remove(f_name)
return read_rdd
def eval_logreg(new_df, filename):
(train, test) = new_df.randomSplit([0.8, 0.2], 24)
train = train.withColumnRenamed('prediction', 'label')
test = test.withColumnRenamed('prediction', 'label')
df = MLUtils.convertVectorColumnsFromML(train, "features")
parsedData = df.select(col("label"), col("features")).rdd.map(
lambda row: LabeledPoint(row.label, row.features))
model = LogisticRegressionWithLBFGS.train(parsedData, numClasses=50)
model.save(spark.sparkContext, filename)
# sameModel = LogisticRegressionModel.load(spark.sparkContext, "LogRegLBFGSModel")
labelsAndPreds = parsedData.map(lambda p:
(p.label, model.predict(p.features)))
trainErr = labelsAndPreds.filter(
lambda lp: lp[0] != lp[1]).count() / float(parsedData.count())
print("LogReg Small Training Error = " + str(trainErr))
df = MLUtils.convertVectorColumnsFromML(test, "features")
parsed_test = df.select(col("label"), col("features")).rdd.map(
lambda row: LabeledPoint(row.label, row.features))
testErr = labelsAndPreds.filter(lambda lp: lp[0] != lp[1]).count() / float(
parsed_test.count())
print("LogReg Small Test Error = " + str(testErr))
def __init__(self, sc):
"""Init the engine and train the model
"""
logger.info("Starting up the GeneLearn Engine: ")
self.sc = sc
logger.info("Loading training data...")
dataset_path = "/Users/qingpeng/Dropbox/Development/Bitbucket/jgi-genelearn/scripts/Flask"
training_file_path = os.path.join(dataset_path, 'training.svmlib')
training = MLUtils.loadLibSVMFile(sc, training_file_path)
self.model = LogisticRegressionWithLBFGS.train(training)
def testing_model(model_directory, libsvm, prediction, report, prc_file):
sc = SparkContext(appName="PythonLinearRegressionWithSGDExample")
model = LogisticRegressionModel.load(sc, model_directory)
testing_rdd = MLUtils.loadLibSVMFile(sc, libsvm,
numFeatures=model.numFeatures)
testing_rdd.cache()
au_prc, precision, recall, thresholds, y_true, y_scores = evaluate_model(
testing_rdd, model)
print 'evaluating_model done!\n'
write_to_report(au_prc, precision, recall, thresholds, report)
print 'write_to_report done!\n'
write_to_prediction(y_true, y_scores, prediction)
print 'write_to_prediction done!\n'
draw_prc(precision, recall, prc_file, au_prc)
print 'draw_prc done!\n'
def analysis(df):
"""ML in Spark
"""
htf = MLHashingTF(inputCol="message", outputCol="tf")
tf = htf.transform(df)
idf = MLIDF(inputCol="tf", outputCol="idf")
tfidf = idf.fit(tf).transform(tf)
#tfidf.show(truncate=True)
#sum_ = udf(lambda v: float(v.values.sum()), DoubleType())
#res_df = tfidf.withColumn("idf_sum", sum_("idf"))
res_df = MLUtils.convertVectorColumnsFromML(tfidf, 'idf')
ml_dataset = res_df.rdd.map(lambda x: x.idf).collect()
model = KMeans.train(sc.parallelize(ml_dataset), 5, 50)
return res_df, model
def training(model_directory, libsvm, scaler):
sc = SparkContext(appName="PythonLinearRegressionWithSGDExample")
training_rdd = MLUtils.loadLibSVMFile(sc, libsvm)
training_rdd.cache()
if scaler == '1':
label = training_rdd.map(lambda x: x.label)
features = training_rdd.map(lambda x: x.features)
scaler1 = StandardScaler().fit(features)
data1 = label.zip(scaler1.transform(features))
# convert into labeled point
data2 = data1.map(lambda x: LabeledPoint(x[0], x[1]))
model_logistic = LogisticRegressionWithLBFGS.train(data2)
else:
model_logistic = LogisticRegressionWithLBFGS.train(training_rdd)
model_logistic.save(sc, model_directory)
def test_load_vectors(self):
import shutil
data = [[1.0, 2.0, 3.0], [1.0, 2.0, 3.0]]
temp_dir = tempfile.mkdtemp()
load_vectors_path = os.path.join(temp_dir, "test_load_vectors")
try:
self.sc.parallelize(data).saveAsTextFile(load_vectors_path)
ret_rdd = MLUtils.loadVectors(self.sc, load_vectors_path)
ret = ret_rdd.collect()
self.assertEqual(len(ret), 2)
self.assertEqual(ret[0], DenseVector([1.0, 2.0, 3.0]))
self.assertEqual(ret[1], DenseVector([1.0, 2.0, 3.0]))
except:
self.fail()
finally:
shutil.rmtree(load_vectors_path)
def predict():
conf = SparkConf().setMaster("local").setAppName("My App")
sc = SparkContext(conf=conf)
testData = MLUtils.loadLibSVMFile(sc, TEST_DATA_PATH)
model = RandomForestModel.load(sc, TEST_MODEL_PATH)
predictions = model.predict(testData.map(lambda x: x.features))
predictlabel_list = predictions.collect()
rateOFeachSort_dict = analyse_result(predictlabel_list)
save(predictlabel_list)
return rateOFeachSort_dict
def do_POST(self):
response_code = 200
response = ""
var_len = int(self.headers.get('Content-Length'))
content = self.rfile.read(var_len)
payload = json.loads(content)
# 如果是训练请求，训练然后保存训练完的神经网络
if payload.get('train'):
# 转化数据格式
TrainData = ""
for d in payload['trainArray'][0]['y0']:
TrainData = TrainData + " " + ('%d' % d)
TrainData = '%d' % (payload['trainArray'][0]['label']
) + "," + TrainData.lstrip() + "\n"
print(TrainData)
Addoutput = open('LabeledPointsdata.txt', 'a')
Addoutput.write(TrainData)
Addoutput.close()
# 如果是预测请求，返回预测值
elif payload.get('predict'):
try:
training = MLUtils.loadLabeledPoints(sc,
"LabeledPointsdata.txt")
print('Begin NaiveBayes tranning!')
model = NaiveBayes.train(training, 1.0)
print('Trainning over!')
print(payload['image'])
response = {
"type": "test",
"result": str(model.predict(payload['image']))
}
except:
response_code = 500
else:
response_code = 400
self.send_response(response_code)
self.send_header("Content-type", "application/json")
self.send_header("Access-Control-Allow-Origin", "*")
self.end_headers()
if response:
self.wfile.write(json.dumps(response))
return
def __index_row_matrix_rdd(self, scale_df):
"""
:param scale_df:
:return:
"""
try:
vector_mllib = MLUtils.convertVectorColumnsFromML(
scale_df, 'scaled_features').drop('features')
vector_rdd = vector_mllib.select(
'scaled_features',
'id').rdd.map(lambda x: IndexedRow(x[1], x[0]))
self.__logger.info("Build Index Row Matrix RDD")
return IndexedRowMatrix(vector_rdd)
except TypeError as te:
raise OpheliaMLException(
f"An error occurred while calling __index_row_matrix_rdd() method: {te}"
)
def Gradient_BoostedTrees(filename, sc):
# Load and parse the data file.
data = MLUtils.loadLibSVMFile(sc, "/Users/Jacob/SparkService/data/sample_libsvm_data.txt")
# Split the data into training and test sets (30% held out for testing)
(trainingData, testData) = data.randomSplit([0.7, 0.3])
# Train a GradientBoostedTrees model.
# Notes: (a) Empty categoricalFeaturesInfo indicates all features are continuous.
# (b) Use more iterations in practice.
model = GradientBoostedTrees.trainClassifier(trainingData,
categoricalFeaturesInfo={}, numIterations=3)
# Evaluate model on test instances and compute test error
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
print('Test Error = ' + str(testErr))
print('Learned classification GBT model:')
print(model.toDebugString())
def test_load_vectors(self):
import shutil
data = [
[1.0, 2.0, 3.0],
[1.0, 2.0, 3.0]
]
temp_dir = tempfile.mkdtemp()
load_vectors_path = os.path.join(temp_dir, "test_load_vectors")
try:
self.sc.parallelize(data).saveAsTextFile(load_vectors_path)
ret_rdd = MLUtils.loadVectors(self.sc, load_vectors_path)
ret = ret_rdd.collect()
self.assertEqual(len(ret), 2)
self.assertEqual(ret[0], DenseVector([1.0, 2.0, 3.0]))
self.assertEqual(ret[1], DenseVector([1.0, 2.0, 3.0]))
except:
self.fail()
finally:
shutil.rmtree(load_vectors_path)
def main(input_file):
sc = pyspark.SparkContext(appName="DecisionTree")
data = MLUtils.loadLabeledPoints(sc, input_file)
trainingData, testData = data.randomSplit([0.70, 0.3])
# Cache in memory for faster training
trainingData.cache()
model = DecisionTree.trainClassifier(trainingData, numClasses=4, impurity='gini',
categoricalFeaturesInfo={}, maxDepth=16, maxBins=10)
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
# print tree_model.toDebugString()
print ""
print ""
print "Test Erros: {}".format(round(testErr,4))
def random_forest():
"""
使用mllib对Spark安装包mllib的测试数据集做随机森林测试
80%数据作为训练数据 20%数据作为测试数据
:return:
"""
data_rdd = MLUtils.loadLibSVMFile(
sc, '{}/mllib/sample_libsvm_data.txt'.format(current_dir))
train_data_rdd, test_data_rdd = data_rdd.randomSplit([0.8, 0.2])
model = RandomForest.trainClassifier(train_data_rdd,
numClasses=2,
categoricalFeaturesInfo={},
numTrees=3)
# 根据测试集的features预测laber值为0还是1
predict_rdd = model.predict(test_data_rdd.map(lambda x: x.features))
# 测试集实际的laber值
labels_rdd = test_data_rdd.map(lambda lp: lp.label).zip(predict_rdd)
# 测试样本中预测值与实际值不符的百分比(错误率)
print(labels_rdd.filter(lambda x: x[0] != x[1]).count())
test_err = labels_rdd.filter(lambda x: x[0] != x[1]).count() / float(
test_data_rdd.count())
print("test error rate:{}".format(test_err))
# 保存 训练好的模型
model_path = "{}/my_random_forest_model".format(current_dir)
if not os.path.exists(model_path):
model.save(sc, model_path)
trained_model = RandomForestModel.load(
sc, "{}/my_random_forest_model".format(current_dir))
print(trained_model.toDebugString())
return trained_model
"""
from __future__ import print_function
import sys
from pyspark import SparkContext
# $example on$
from pyspark.mllib.tree import RandomForest, RandomForestModel
from pyspark.mllib.util import MLUtils
# $example off$
if __name__ == "__main__":
sc = SparkContext(appName="PythonRandomForestClassificationExample")
# $example on$
# Load and parse the data file into an RDD of LabeledPoint.
data = MLUtils.loadLibSVMFile(sc, 'data/mllib/sample_libsvm_data.txt')
# Split the data into training and test sets (30% held out for testing)
(trainingData, testData) = data.randomSplit([0.7, 0.3])
# Train a RandomForest model.
# Empty categoricalFeaturesInfo indicates all features are continuous.
# Note: Use larger numTrees in practice.
# Setting featureSubsetStrategy="auto" lets the algorithm choose.
model = RandomForest.trainClassifier(trainingData, numClasses=2, categoricalFeaturesInfo={},
numTrees=3, featureSubsetStrategy="auto",
impurity='gini', maxDepth=4, maxBins=32)
# Evaluate model on test instances and compute test error
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
parts = line.strip().split("::")
return (int(parts[0]),int(parts[1]),float(parts[2]))
if __name__ =="__main__":
if(len(sys.argv)!=2):
print "Usage: /path to spark/bin/spark-submit name.py movieDir"
# step 1 - create spark context
conf = SparkConf().setAppName("KMeans-Content")\
.set("spark.executor.memory","1g")
sc = SparkContext()
# step 2 - load in input file
data = MLUtils.loadLibSVMFile(sc,"/Users/Ellen/Desktop/movie_features_dataset.dat")
labels = data.map(lambda x:x.label)
features = data.map(lambda x:x.features)
# step 3 - standarize the data with unit values and 0 mean
scaler = StandardScaler(withMean=False,withStd=True).fit(features)
data2 = labels.zip(scaler.transform(features))
numFeatures = len(data2.values().take(10)[0])
print "Type of data2: ",type(data2) #RDD
print "Type of data2.values(): ",type(data2.values()) # pipelinedrdd
print "Sample: ",data2.values().take(1)[0]
# splitting up the data to training, validation and testing models.
exit(1)
if __name__ == "__main__":
if len(sys.argv) > 2:
usage()
sc = SparkContext(appName="PythonDT")
# Load data.
dataPath = 'train_svm'# 'data/mllib/sample_libsvm_data.txt'
if len(sys.argv) == 2:
dataPath = sys.argv[1]
if not os.path.isfile(dataPath):
sc.stop()
usage()
points = MLUtils.loadLibSVMFile(sc, dataPath)
# Re-index class labels if needed.
(reindexedData, origToNewLabels) = reindexClassLabels(points)
numClasses = len(origToNewLabels)
# Train a classifier.
categoricalFeaturesInfo = {} # no categorical features
#model = DecisionTree.trainClassifier(reindexedData, numClasses=numClasses,
# categoricalFeaturesInfo=categoricalFeaturesInfo)
model = RandomForest.trainClassifier(reindexedData, numClasses=numClasses,categoricalFeaturesInfo={},numTrees=30,featureSubsetStrategy='auto', impurity='gini', maxDepth=8, maxBins=40, )
# Print learned tree and stats.
print origToNewLabels
print "Trained DecisionTree for classification:"
# print " Model numNodes: %d" % model.numNodes()
# print " Model depth: %d" % model.depth()
print " Training accuracy: %g" % getAccuracy(model, reindexedData)
def logsreg(loadTrainingFilePath, sc):
# Load training data in LIBSVM format
loadTrainingFilePath = '/Users/Jacob/repository/SparkService/data/sample_libsvm_data.txt'
data = MLUtils.loadLibSVMFile(sc, loadTrainingFilePath)
# Split data into training (60%) and test (40%)
traindata, testdata = data.randomSplit([0.6, 0.4], seed = 11L)
traindata.cache()
# Load testing data in LIBSVM format
#testdata = MLUtils.loadLibSVMFile(sc, loadTestingFilePath)
# Run training algorithm to build the model
model = LogisticRegressionWithLBFGS.train(traindata, numClasses=3)
# Compute raw scores on the test set
predictionAndLabels = testdata.map(lambda lp: (float(model.predict(lp.features)), lp.label))
Json.generateJson("LogisticRegression", "12345678", traindata, predictionAndLabels);
print 'Completed.'
# Instantiate metrics object
# metrics = MulticlassMetrics(predictionAndLabels)
# # Overall statistics
# precision = metrics.precision()
# recall = metrics.recall()
# f1Score = metrics.fMeasure()
# #confusion_matrix = metrics.confusionMatrix().toArray()
# print("Summary Stats")
# print("Precision = %s" % precision)
# print("Recall = %s" % recall)
# print("F1 Score = %s" % f1Score)
# # Statistics by class
# labels = traindata.map(lambda lp: lp.label).distinct().collect()
# for label in sorted(labels):
# print("Class %s precision = %s" % (label, metrics.precision(label)))
# print("Class %s recall = %s" % (label, metrics.recall(label)))
# print("Class %s F1 Measure = %s" % (label, metrics.fMeasure(label, beta=1.0)))
# # Weighted stats
# print("Weighted recall = %s" % metrics.weightedRecall)
# print("Weighted precision = %s" % metrics.weightedPrecision)
# print("Weighted F(1) Score = %s" % metrics.weightedFMeasure())
# print("Weighted F(0.5) Score = %s" % metrics.weightedFMeasure(beta=0.5))
# print("Weighted false positive rate = %s" % metrics.weightedFalsePositiveRate)
# #return model parameters
# res = [('1','Yes','TP Rate', metrics.truePositiveRate(0.0)),
# ('2','Yes','FP Rate', metrics.falsePositiveRate(0.0)),
# ('3','Yes','Precision', metrics.precision(0.0)),
# ('4','Yes','Recall', metrics.recall(0.0)),
# ('5','Yes','F-Measure', metrics.fMeasure(0.0, beta=1.0)),
# ('1','Yes','TP Rate', metrics.truePositiveRate(1.0)),
# ('2','Yes','FP Rate', metrics.falsePositiveRate(1.0)),
# ('3','Yes','Precision', metrics.precision(1.0)),
# ('4','Yes','Recall', metrics.recall(1.0)),
# ('5','Yes','F-Measure', metrics.fMeasure(1.0, beta=1.0)),
# ('1','Yes','TP Rate', metrics.truePositiveRate(2.0)),
# ('2','Yes','FP Rate', metrics.falsePositiveRate(2.0)),
# ('3','Yes','Precision', metrics.precision(2.0)),
# ('4','Yes','Recall', metrics.recall(2.0)),
# ('5','Yes','F-Measure', metrics.fMeasure(2.0, beta=1.0))]
# #save output file path as JSON and dump into dumpFilePath
# rdd = sc.parallelize(res)
# SQLContext.createDataFrame(rdd).collect()
# df = SQLContext.createDataFrame(rdd,['Order','CLass','Name', 'Value'])
#tempDumpFilePath = dumpFilePath + "/part-00000"
#if os.path.exists(tempDumpFilePath):
# os.remove(tempDumpFilePath)
#df.toJSON().saveAsTextFile(hdfsFilePath)
#tmpHdfsFilePath = hdfsFilePath + "/part-00000"
#subprocess.call(["hadoop","fs","-copyToLocal", tmpHdfsFilePath, dumpFilePath])
# Save and load model
#clusters.save(sc, "myModel")
#sameModel = KMeansModel.load(sc, "myModel")
from math import log, exp
from pyspark import SparkContext
from pyspark.sql import SQLContext
from pyspark.mllib.tree import RandomForest, RandomForestModel
from pyspark.mllib.util import MLUtils
from pyspark.mllib.regression import LabeledPoint
sc = SparkContext()
sqlContext = SQLContext(sc)
data = MLUtils.loadLibSVMFile(sc, "hdfs:///hndata/docvecs")
data = data.map(lambda lp: LabeledPoint(exp(lp.label)-1.0, lp.features))
# Split the data into training and test sets
(trainingData, testData) = data.randomSplit([0.7, 0.3])
# Train a RandomForest model.
# Empty categoricalFeaturesInfo indicates all features are continuous.
# Note: Use larger numTrees in practice.
# Setting featureSubsetStrategy="auto" lets the algorithm choose.
rr = RandomForest.trainRegressor(trainingData, categoricalFeaturesInfo={},
numTrees=5, featureSubsetStrategy="auto",
impurity='variance', maxDepth=4, maxBins=32)
predictions = rr.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testMSE = labelsAndPredictions.map(lambda (v, p): (v - p) * (v - p)).sum() / float(testData.count())
print('Test Mean Squared Error = ' + str(testMSE))
print('Learned regression forest rr:')
from pyspark.mllib.stat import Statistics
from pyspark.mllib.util import MLUtils
if __name__ == "__main__":
if len(sys.argv) not in [1, 2]:
print("Usage: correlations (<file>)", file=sys.stderr)
exit(-1)
sc = SparkContext(appName="PythonCorrelations")
if len(sys.argv) == 2:
filepath = sys.argv[1]
else:
filepath = 'data/mllib/sample_linear_regression_data.txt'
corrType = 'pearson'
points = MLUtils.loadLibSVMFile(sc, filepath)\
.map(lambda lp: LabeledPoint(lp.label, lp.features.toArray()))
print()
print('Summary of data file: ' + filepath)
print('%d data points' % points.count())
# Statistics (correlations)
print()
print('Correlation (%s) between label and each feature' % corrType)
print('Feature\tCorrelation')
numFeatures = points.take(1)[0].features.size
labelRDD = points.map(lambda lp: lp.label)
for i in range(numFeatures):
featureRDD = points.map(lambda lp: lp.features[i])
corr = Statistics.corr(labelRDD, featureRDD, corrType)
print('%d\t%g' % (i, corr))
import pyspark
from pyspark.mllib.tree import RandomForest, RandomForestModel
from pyspark.mllib.util import MLUtils
sc = pyspark.SparkContext(appName="RandomForest")
# Load and parse the data file into an RDD of LabeledPoint.
data = MLUtils.loadLabeledPoints(sc, 'gs://cs123data/Output/AmountVectors2/')
# Split the data into training and test sets
trainingData, testData = data.randomSplit([0.7, 0.3])
trainingData.cache()
testData.cache()
model = RandomForest.trainRegressor(trainingData, categoricalFeaturesInfo={},
numTrees=20, featureSubsetStrategy="auto",
impurity='variance', maxDepth=3, maxBins=32)
# Evaluate model on test instances and compute test error
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testMSE = labelsAndPredictions.map(lambda (v, p): (v - p) * (v - p)).sum() /\
float(testData.count())
print('Test Mean Squared Error = ' + str(testMSE))
print('Learned regression forest model:')
print(model.toDebugString())
sys.path.append("/path/to/spark/python")
try:
from pyspark import SparkContext, SparkConf
from pyspark.mllib.tree import RandomForest, RandomForestModel
from pyspark.mllib.util import MLUtils
print ("Successfully imported Spark Modules")
except ImportError as e:
print ("Can not import Spark Modules", e)
sys.exit(1)
if __name__ == "__main__":
conf = SparkConf().setAppName("RandomForest_Iris")
sc = SparkContext(conf = conf)
print "Loading data..."
data = MLUtils.loadLibSVMFile(sc, '../../data/iris/iris.scale')
(trainingData, testData) = data.randomSplit([0.7, 0.3])
# Train a RandomForest model.
model = RandomForest.trainClassifier(trainingData, numClasses=4,
categoricalFeaturesInfo={},
numTrees=5, featureSubsetStrategy="auto",
impurity='gini', maxDepth=4, maxBins=32)
# Evaluate model on test instances and compute test error
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
print('Test Error = ' + str(testErr))
print('Learned classification forest model:')
print(model.toDebugString())
# Save model
model.save(sc, "model")
def summarize(dataset):
print "schema: %s" % dataset.schema().json()
labels = dataset.map(lambda r: r.label)
print "label average: %f" % labels.mean()
features = dataset.map(lambda r: r.features)
summary = Statistics.colStats(features)
print "features average: %r" % summary.mean()
if __name__ == "__main__":
if len(sys.argv) > 2:
print >> sys.stderr, "Usage: dataset_example.py <libsvm file>"
exit(-1)
sc = SparkContext(appName="DatasetExample")
sqlContext = SQLContext(sc)
if len(sys.argv) == 2:
input = sys.argv[1]
else:
input = "data/mllib/sample_libsvm_data.txt"
points = MLUtils.loadLibSVMFile(sc, input)
dataset0 = sqlContext.inferSchema(points).setName("dataset0").cache()
summarize(dataset0)
tempdir = tempfile.NamedTemporaryFile(delete=False).name
os.unlink(tempdir)
print "Save dataset as a Parquet file to %s." % tempdir
dataset0.saveAsParquetFile(tempdir)
print "Load it back and summarize it again."
dataset1 = sqlContext.parquetFile(tempdir).setName("dataset1").cache()
summarize(dataset1)
shutil.rmtree(tempdir)
# parsedData = data.map(lambda line: array([float(x) for x in line.split(' ')]))
# # Build the model (cluster the data)
# clusters = KMeans.train(parsedData, 3, maxIterations=10, runs=30, initializationMode="random")
#
# WSSSE = parsedData.map(lambda point: error(point)).reduce(lambda x, y: x + y)
# print("Within Set Sum of Squared Error = " + str(WSSSE))
#
# res = [('k_means',dumpFilePath, WSSSE)]
# rdd = sc.parallelize(res)
# SQLContext.createDataFrame(rdd).collect()
# df = SQLContext.createDataFrame(rdd,['model_name','res_path', 'WSSSE'])
# df.toJSON().saveAsTextFile(dumpFilePath)
if(model_name == "Regression"):
# Load training data in LIBSVM format
data = MLUtils.loadLibSVMFile(sc, loadTrainingFilePath)
# Split data into training (60%) and test (40%)
traindata, testdata = data.randomSplit([0.6, 0.4], seed = 11L)
traindata.cache()
# Load testing data in LIBSVM format
#testdata = MLUtils.loadLibSVMFile(sc, loadTestingFilePath)
# Run training algorithm to build the model
model = LogisticRegressionWithLBFGS.train(traindata, numClasses=3)
# Compute raw scores on the test set
predictionAndLabels = testdata.map(lambda lp: (float(model.predict(lp.features)), lp.label))
accuracy = metrics.accuracy_score(expected, predicted)
if i==0: print("Random Forest accuracy is {}".format(accuracy))
else: print("Gradient Boosting accuracy is {}".format(accuracy))
cal_model_accuracy((RFT, GBT))
# In[6]:
#IV Use MLlib
sc = SparkContext("local", "Ensemble_Tree")
# In[7]:
data = MLUtils.loadLibSVMFile(sc, '/usr/local/spark/data/mllib/sample_libsvm_data.txt')
# In[8]:
#Split the training set and test set
(trainingData, testData) = data.randomSplit([0.7, 0.3])
# In[9]:
#Training model
RF_model = RandomForest.trainClassifier(trainingData, numClasses=2, categoricalFeaturesInfo={},
numTrees=3, featureSubsetStrategy="auto",
impurity='gini', maxDepth=5, maxBins=32)
# $example on$
from pyspark.mllib.classification import LogisticRegressionWithLBFGS
from pyspark.mllib.util import MLUtils
from pyspark.mllib.evaluation import MulticlassMetrics
# $example off$
from pyspark import SparkContext
if __name__ == "__main__":
sc = SparkContext(appName="MultiClassMetricsExample")
# Several of the methods available in scala are currently missing from pyspark
# $example on$
# Load training data in LIBSVM format
data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_multiclass_classification_data.txt")
# Split data into training (60%) and test (40%)
training, test = data.randomSplit([0.6, 0.4], seed=11)
training.cache()
# Run training algorithm to build the model
model = LogisticRegressionWithLBFGS.train(training, numClasses=3)
# Compute raw scores on the test set
predictionAndLabels = test.map(lambda lp: (float(model.predict(lp.features)), lp.label))
# Instantiate metrics object
metrics = MulticlassMetrics(predictionAndLabels)
# Overall statistics
def __init__(self,sc, path):
# Load and parse the data file into an RDD of LabeledPoint.
self.data = MLUtils.loadLibSVMFile(sc, path)
d2.take(2)
# In[21]:
from pyspark.mllib.util import MLUtils
dataOutput="libsvm_data.txt"
import os.path
import shutil
if os.path.exists(dataOutput):
shutil.rmtree(dataOutput)#os.rmdir(dataOutput)
print dataOutput
MLUtils.saveAsLibSVMFile(d2,"libsvm_data.txt")
# In[22]:
for i,x in enumerate(features): print i,x
# In[23]:
# Split the data into training and test sets (30% held out for testing)
(trainingData, testData) = d2.randomSplit([0.7, 0.3])
# Train a DecisionTree model.
# Empty categoricalFeaturesInfo indicates all features are continuous.
rf = GBTRegressor(maxIter=30, maxDepth=4, labelCol="indexedLabel")
model = rf.fit(train)
predictionAndLabels = model.transform(test).select("prediction", "indexedLabel") \
.map(lambda x: (x.prediction, x.indexedLabel))
metrics = RegressionMetrics(predictionAndLabels)
print("rmse %.3f" % metrics.rootMeanSquaredError)
print("r2 %.3f" % metrics.r2)
print("mae %.3f" % metrics.meanAbsoluteError)
if __name__ == "__main__":
if len(sys.argv) > 1:
print("Usage: gradient_boosted_trees", file=sys.stderr)
exit(1)
sc = SparkContext(appName="Jay")
sqlContext = SQLContext(sc)
# Load and parse the data file into a dataframe.
df = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
# Map labels into an indexed column of labels in [0, numLabels)
stringIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel")
si_model = stringIndexer.fit(df)
td = si_model.transform(df)
[train, test] = td.randomSplit([0.7, 0.3])
testClassification(train, test)
testRegression(train, test)
sc.stop()
# Import DecisionTree / DecisionTreeModel
from pyspark.mllib.tree import DecisionTree, DecisionTreeModel
from pyspark.mllib.regression import LabeledPoint
from pyspark.mllib.util import MLUtils
from pyspark import SparkContext
sc = SparkContext("local", "SVM")
# Loading and parsing data into RDD of LabeledPoint
# Sample data provided by Spark 1.3.1 folder
# To run locally
#data = MLUtils.loadLibSVMFile(sc, 'sample_libsvm_data.txt')
# To run on hadoop server
data = MLUtils.loadLibSVMFile(sc, 'jingrong/sample_libsvm_data.txt')
# Splits data - Approximately 70% training , 30% testing
(trainingData, testData) = data.randomSplit([0.7, 0.3])
# Train the decision tree model
# Empty categoricalFeaturesInfo indicates that all features are continuous.
model = DecisionTree.trainRegressor(trainingData, categoricalFeaturesInfo={}, impurity='variance', maxDepth=5, maxBins=32)
# Evaluate the model on test instances, compute test error
allPredictions = model.predict(testData.map(lambda x: x.features))
predictionsAndLabels = testData.map(lambda pl: pl.label).zip(allPredictions)
testMeanSquaredError = predictionsAndLabels.map(lambda (v, p): (v - p) * (v - p)).sum() / float(testData.count())
# Printing results
print "Tested Mean Squared Error: ", testMeanSquaredError
sc = spark.sparkContext
#-------------------------------------------------------------------------------
# Read the training data and build the model
#-------------------------------------------------------------------------------
#reading the train dataframes
trainingDF = spark.read.load("../data/train_small.parquet")
#convert every row to LabeledPoint
transformedTrainingRDD = (trainingDF.rdd.map(
lambda row: LabeledPoint(int(row.label) - 1, row.features)))
#print transformedTrainingRDD.show()
#Save the RDD in LibSVM format, as Naive Bayes reads in the same format
MLUtils.saveAsLibSVMFile(transformedTrainingRDD, "trainingLibsvmfile")
training = MLUtils.loadLibSVMFile(sc, "trainingLibsvmfile/*")
print "trainingLibsvmfile created!!"
# Train a RandomForest model.
# Empty categoricalFeaturesInfo indicates all features are continuous.
# Note: Use larger numTrees in practice.
# Setting featureSubsetStrategy="auto" lets the algorithm choose.
model = RandomForest.trainClassifier(training,
numClasses=10,
categoricalFeaturesInfo={},
numTrees=24,
featureSubsetStrategy="auto",
impurity='gini',
maxDepth=4,
maxBins=32)
# $example on$
import math
from pyspark.mllib.regression import LabeledPoint, IsotonicRegression, IsotonicRegressionModel
from pyspark.mllib.util import MLUtils
# $example off$
if __name__ == "__main__":
sc = SparkContext(appName="PythonIsotonicRegressionExample")
# $example on$
# Load and parse the data
def parsePoint(labeledData):
return (labeledData.label, labeledData.features[0], 1.0)
data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_isotonic_regression_libsvm_data.txt")
# Create label, feature, weight tuples from input data with weight set to default value 1.0.
parsedData = data.map(parsePoint)
# Split data into training (60%) and test (40%) sets.
training, test = parsedData.randomSplit([0.6, 0.4], 11)
# Create isotonic regression model from training data.
# Isotonic parameter defaults to true so it is only shown for demonstration
model = IsotonicRegression.train(training)
# Create tuples of predicted and real labels.
predictionAndLabel = test.map(lambda p: (model.predict(p[1]), p[0]))
# Calculate mean squared error between predicted and real labels.
input = "data/mllib/sample_libsvm_data.txt"
# Load input data
print("Loading LIBSVM file with UDT from " + input + ".")
df = spark.read.format("libsvm").load(input).cache()
print("Schema from LIBSVM:")
df.printSchema()
print("Loaded training data as a DataFrame with " +
str(df.count()) + " records.")
# Show statistical summary of labels.
labelSummary = df.describe("label")
labelSummary.show()
# Convert features column to an RDD of vectors.
features = MLUtils.convertVectorColumnsFromML(df, "features") \
.select("features").rdd.map(lambda r: r.features)
summary = Statistics.colStats(features)
print("Selected features column with average values:\n" +
str(summary.mean()))
# Save the records in a parquet file.
tempdir = tempfile.NamedTemporaryFile(delete=False).name
os.unlink(tempdir)
print("Saving to " + tempdir + " as Parquet file.")
df.write.parquet(tempdir)
# Load the records back.
print("Loading Parquet file with UDT from " + tempdir)
newDF = spark.read.parquet(tempdir)
print("Schema from Parquet:")
newDF.printSchema()
from pyspark.mllib.regression import LabeledPoint
from pyspark.mllib.tree import DecisionTree, DecisionTreeModel
from pyspark.mllib.util import MLUtils
# Load and parse the data file into an RDD of LabeledPoint.
data = MLUtils.loadLibSVMFile(sc, 'file')
# Split the data into training and test sets (30% held out for testing)
(trainingData, testData) = data.randomSplit([0.7, 0.3])
# Train a DecisionTree model.
# Empty categoricalFeaturesInfo indicates all features are continuous.
model = DecisionTree.trainClassifier(trainingData, numClasses=2, categoricalFeaturesInfo={},
impurity='entropy', maxDepth=5, maxBins=32)
# Evaluate model on test instances and compute test error
predictions = model.predict(testData.map(lambda x: x.features))
labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
print('Test Error = ' + str(testErr))
print('Learned classification tree model:')
print(model.toDebugString())
# Save and load model
model.save(sc, "myModelPath")
sameModel = DecisionTreeModel.load(sc, "myModelPath")
import shutil
from pyspark import SparkContext
# $example on$
from pyspark.mllib.classification import NaiveBayes, NaiveBayesModel
from pyspark.mllib.util import MLUtils
# $example off$
if __name__ == "__main__":
sc = SparkContext(appName="PythonNaiveBayesExample")
# $example on$
# Load and parse the data file.
data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
# Split data approximately into training (60%) and test (40%)
training, test = data.randomSplit([0.6, 0.4])
# Train a naive Bayes model.
model = NaiveBayes.train(training, 1.0)
# Make prediction and test accuracy.
predictionAndLabel = test.map(lambda p:
(model.predict(p.features), p.label))
accuracy = 1.0 * predictionAndLabel.filter(
lambda pl: pl[0] == pl[1]).count() / test.count()
print('model accuracy {}'.format(accuracy))
# Save and load model
# Try and import the PySpark classes
try:
from pyspark import SparkContext
from pyspark import SparkConf
from pyspark.mllib.classification import LogisticRegressionWithSGD
from pyspark.mllib.classification import LabeledPoint
from pyspark.mllib.util import MLUtils
print("Successfully loaded Spark and MLlib classes...")
except ImportError as e:
print("Error importing spark modules", e)
sys.exit(1)
from numpy import array
conf = SparkConf().setAppName("RecessionPredictionModel").setMaster("local")
sc = SparkContext(conf=conf)
data = sc.textFile("/Users/agaram/development/DataScienceExperiments/econometricsPoc/EconometricsDataSlope.csv/Sheet1-Table1.csv")
parsedData = data.map(lambda line: LabeledPoint([float(x) for x in line.split(',')[1:8]][6],
array([float(x) for x in line.split(',')[1:8]])))
MLUtils.saveAsLibSVMFile(parsedData, "/Users/agaram/development/DataScienceExperiments/econometricsPoc/svmDataSlope")
import numpy as np
from pyspark.mllib.linalg import Vectors
# Configure the environment
if 'SPARK_HOME' not in os.environ:
os.environ['SPARK_HOME'] = '$SPARK_HOME'
# $example off$
if __name__ == "__main__":
sc = SparkContext(appName="PythonNaiveBayesExample")
# $example on$
# Load and parse the data file.
data = MLUtils.loadLibSVMFile(
sc, "/home/ajit/Desktop/spark_lib/sample_libsvm_data.txt")
print(type(data))
print(data)
# Split data approximately into training (60%) and test (40%)
training, test = data.randomSplit([0.6, 0.4])
# Train a naive Bayes model.
model = NaiveBayes.train(training, 1.0)
# Make prediction and test accuracy.
predictionAndLabel = test.map(lambda p:
(model.predict(p.features), p.label))
accuracy = 1.0 * predictionAndLabel.filter(
lambda (x, v): x == v).count() / test.count()
print(type(predictionAndLabel))
# MAGIC Upon completing this lab you should understand how to read from and write to files in Spark, convert between `RDDs` and `DataFrames`, and build a model using both the ML and MLlib APIs. # COMMAND ---------- # MAGIC %md # MAGIC #### Loading the data # MAGIC # MAGIC First, we need to load data into Spark. We'll use a built-in utility to load a [libSVM file](www.csie.ntu.edu.tw/~cjlin/libsvm/faq.html), which is stored in an S3 bucket on AWS. We'll use `MLUtils.loadLibSVMFile` to load our file. Here are the [Python](http://spark.apache.org/docs/latest/api/python/pyspark.mllib.html#pyspark.mllib.util.MLUtils.loadLibSVMFile) and [Scala](https://spark.apache.org/docs/latest/api/scala/index.html#org.apache.spark.mllib.util.MLUtils$) APIs. # COMMAND ---------- from pyspark.mllib.util import MLUtils baseDir = '/mnt/ml-amsterdam/' irisPath = baseDir + 'iris.scale' irisRDD = MLUtils.loadLibSVMFile(sc, irisPath, minPartitions=20).cache() # We get back an RDD of LabeledPoints. Note that the libSVM format uses SparseVectors. irisRDD.take(5) # COMMAND ---------- # MAGIC %md # MAGIC What if we wanted to see the first few lines of the libSVM file to see what the format looks like? # COMMAND ---------- sc.textFile(irisPath).take(5) # COMMAND ----------
from __future__ import print_function
# $example on$
from pyspark import SparkContext
from pyspark.ml import Pipeline
from pyspark.ml.classification import DecisionTreeClassifier
from pyspark.ml.feature import StringIndexer, VectorIndexer
from pyspark.ml.evaluation import MulticlassClassificationEvaluator
from pyspark.mllib.tree import DecisionTree, DecisionTreeModel
from pyspark.mllib.util import MLUtils
from pyspark.mllib.tree import RandomForest, RandomForestModel
from pyspark.mllib.util import MLUtils
if __name__ == "__main__":
sc = SparkContext(appName="PythonRandomForestRegxample")
data = MLUtils.loadLibSVMFile(sc,"file:///home/yl408/yuhao_datasets/phishing")
#data = spark.read.format("libsvm").load("file:///home/yl408/yuhao_datasets/rcv1_train.binary")
model = RandomForest.trainRegressor(data, categoricalFeaturesInfo={},
numTrees=3, featureSubsetStrategy="auto",
impurity='variance', maxDepth=4, maxBins=32)
model.save(sc, "file:///home/yl408/spark-ml/myrandomForestModel")
"""
from __future__ import print_function
from pyspark import SparkContext
from pyspark.mllib.tree import DecisionTree, DecisionTreeModel
from pyspark.mllib.util import MLUtils
import json
from bson import json_util
from bson.json_util import dumps
if __name__ == "__main__":
sc = SparkContext(appName="DecisionTreeClassification")
raw_data = MLUtils.loadLibSVMFile(sc, '/home/hechem/spark-campaign-classification/test/data/sample_libsvm_data.txt')
(trainingDataSet, testDataSet) = raw_data.randomSplit([0.7, 0.3])
tree = DecisionTree.trainClassifier(trainingDataSet, numClasses=2, categoricalFeaturesInfo={}, impurity='gini', maxDepth=4, maxBins=30)
predictions = tree.predict(testDataSet.map(lambda x: x.features))
labelsAndPredictions = testDataSet.map(lambda lp: lp.label).zip(predictions)
testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testDataSet.count())
print('Test Error = ' + str(testErr))
print('Learned classification tree model:')
print(tree.toDebugString())
tree_to_json = tree.toDebugString()
# Parser
def parse(lines):
block = []
