def main():
learner = lambda d, l: adaboost.train(
stump.random, stump.predict, data=d, labels=l, iters=3000)
codes, predictors = train('data/8newsgroup/train.trec', 20, learner,
adaboost.predict)
train_error = test('data/8newsgroup/train.trec', codes, predictors)
test_error = test('data/8newsgroup/test.trec', codes, predictors)
print "\ntrain_err=%.6f, test_err=%.6f" % (train_error, test_error)
def test_train(self):
print("Test Train:")
data_mat, labels_arr = adb.load_simple_data()
classifies_arr, est_agg = adb.train(data_mat, labels_arr, 9)
self.assertEqual(len(classifies_arr), 3)
self.assertEqual(0, classifies_arr[-1]['dim'])
self.assertEqual('lt', classifies_arr[-1]['ineq'])
self.assertEqual(0.9, classifies_arr[-1]['thresh'])
self.assertEqual(0.8958797346, round(classifies_arr[-1]['alpha'], 10))
def test_classify(self):
print("Test Classify:")
print("Classify Simple Data:")
data_mat, labels_arr = adb.load_simple_data()
classifies_arr, est_agg = adb.train(data_mat, labels_arr, 30)
pred = adb.classify([[5, 5], [0, 0]], classifies_arr)
res = np.matrix([[1.], [-1.]])
self.assertEqual(True, (pred == res).all())
print("Classify Loaded Data:")
datArr, labelArr = adb.load_data_set('horseColicTraining2.txt')
classiferArray, aggClassEst = adb.train(datArr, labelArr, 10)
testArr, testLabelArr = adb.load_data_set('horseColicTest2.txt')
prediction10 = adb.classify(testArr, classiferArray)
errArr = np.mat(np.ones((67, 1)))
err_rate = errArr[prediction10 != np.mat(testLabelArr).T].sum() / 67
self.assertEqual(16.0 / 67, err_rate)
print("Test Error: %f%%" % (err_rate * 100))
# 绘制ROC和计算AUC
val_auc = adb.plot_roc(aggClassEst, labelArr)
self.assertLessEqual(0.8582969635, round(val_auc, 10))
def active_learning(filenames, random=False):
data, labels = load_data(filenames, delimiter=",", label_map={0.0:-1.0,1.0:1.0})
total = len(data)
state = np.random.get_state()
np.random.shuffle(data)
np.random.set_state(state)
np.random.shuffle(labels)
step = int(ceil(0.025 * len(labels)))
sample_data = np.copy(data[-step*2:])
sample_labels = np.copy(labels[-step*2:])
data = np.delete(data, np.s_[-step*2:], axis=0)
labels = np.delete(labels, np.s_[-step*2:])
for x in range(19):
assert len(data) + len(sample_data) == total
assert len(labels) + len(sample_labels) == total
# train using data
alphas, predictors = adaboost.train(
stump.random, stump.predict,
data=sample_data, labels=sample_labels, iters=1000
)
# calculate the error
train_error = adaboost.test(alphas, predictors, data=sample_data, labels=sample_labels)
test_error = adaboost.test(alphas, predictors, data=data, labels=labels)
sample = (x + 2) * 0.025
msg = "sample=%.3f, train_err=%.6f, test_err=%.6f"
print msg % (sample, train_error, test_error)
# pick new sample points
if random:
sample_data = np.append(sample_data, data[-step:], axis=0)
sample_labels = np.append(sample_labels, labels[-step:])
data = np.delete(data, np.s_[-step:], axis=0)
labels = np.delete(labels, np.s_[-step:])
else:
margins = np.absolute(sum([
alpha * predictor(data)
for alpha, predictor in zip(alphas, predictors)
]))
sorted = margins.argsort()[:step]
sample_data = np.append(sample_data, data[sorted], axis=0)
sample_labels = np.append(sample_labels, labels[sorted])
data = np.delete(data, sorted, axis=0)
labels = np.delete(labels, sorted)
def uci(folder):
data, labels = load_data(folder)
for step in STEPS:
state = np.random.get_state()
np.random.shuffle(data)
np.random.set_state(state)
np.random.shuffle(labels)
i = ceil(step * data.shape[DATA_AXIS])
alphas, predictors = adaboost.train(stump.random,
stump.predict,
data=data[:i],
labels=labels[:i],
iters=500)
train_error = adaboost.test(alphas,
predictors,
data=data[:i],
labels=labels[:i])
test_error = adaboost.test(alphas,
predictors,
data=data[i:],
labels=labels[i:])
msg = "sample=%.2f, train_err=%.6f, test_err=%.6f"
print msg % (step, train_error, test_error)
# Resolving conflict, if any. Shouldn't be the same
if column_1 == column_2:
if column_2 != total_num_of_cols:
column_2 += 1
else:
column_2 -= 1
random_hyp_pairs.append((column_1,column_2))
# Running train for the different orientations...
# Each run will return a dict of dicts with key as particular orientation
# Pipeline the dicts returned from one training stage to another till we finish.
# Output will be a dict of dict with 4 keys (0, 90, 180, 270)
print("Max iterations set to: ", max_iterations)
alphas_for_0 = adaboost.train(data, 0, random_hyp_pairs, max_iterations, hyp_alphas)
alphas_for_90 = adaboost.train(data, 90, random_hyp_pairs, max_iterations, alphas_for_0)
alphas_for_180 = adaboost.train(data, 180, random_hyp_pairs, max_iterations, alphas_for_90)
alphas_for_270 = adaboost.train(data, 270, random_hyp_pairs, max_iterations, alphas_for_180)
# Storing model params in a pickle to retain dictionary structure
pickle.dump(alphas_for_270, f, protocol=pickle.HIGHEST_PROTOCOL)
end = datetime.datetime.now()
print("Finished training in", end-start)
# Training ends....
f.close()
#----------------------------------#
# TESTING #
#----------------------------------#
import numpy as np
import adaboost
def createDataSet(filename):
file = open(filename, 'r')
lines = file.readlines()
file.close()
dataSet, labels = [], []
for line in lines:
data = line.split()
dataSet.append(list(map(float, data[:-1])))
labels.append(int(float(data[-1])))
return np.array(dataSet), np.array(labels)
trainingSet, trainingLabels = createDataSet('data/horse/training.txt')
stumps = adaboost.train(trainingSet, trainingLabels)
testSet, testLabels = createDataSet('data/horse/test.txt')
res = adaboost.classify(testSet, stumps)
a, b = np.sum(res == testLabels), len(testLabels)
print('Correctness: %d/%d = %.2f%%' % (a, b, a/b * 100))
return mat
train_face_features = features_to_mat(features, train_face_integral_images)
train_face_labels = [1.] * len(train_face_features)
train_non_face_features = features_to_mat(features,
train_non_face_integral_images)
train_non_face_labels = [-1.] * len(train_non_face_features)
test_face_features = features_to_mat(features, test_face_integral_images)
test_non_face_features = features_to_mat(features,
test_non_face_integral_images)
adaboost_classifiers = adaboost.train(
train_face_features + train_non_face_features,
train_face_labels + train_non_face_labels, 10)
def output_round(features, ada_classifiers, round):
best_feature_idx = ada_classifiers[round - 1]['index']
best_feature = features[best_feature_idx]
print("\nAdaboost rounds: %d" % round)
# print image with top feature rectangle
if best_feature.type == FeatureType.TWO_HORIZONTAL:
printed_img = draw_feature_2h(open_face(test_face_images[0]),
best_feature)
print("\nType: TWO_HORIZONTAL")
elif best_feature.type == FeatureType.TWO_VERTICAL:
with open(join(mypath, file), "r") as f:
templist = []
for line in f:
for word in line.split():
if word not in templist and word.isnumeric(): #len(word) > 1
templist.append(word)
templist.append(not "spmsg" in file)
development_mails.append(templist)
print("Training bayes and adaboost...")
for i in range(len(generalHyperParameters)):
print(i)
correctBayes = 0
correctAdaboost = 0
basic_classifiers_with_weights = adaboost.train(
trainMailsList, trainHam, trainSpam, sortedIGs,
generalHyperParameters[i]) #maybe allMailsList as well
bayes_probabilities = naiveBayes.train(
sortedIGs, allWords, trainHam, trainSpam,
generalHyperParameters[i]) #parameters for naive_bayes
for incoming in development_mails:
if adaboost.predict(basic_classifiers_with_weights, sortedIGs,
incoming,
generalHyperParameters[i]) == incoming[-1]:
correctAdaboost += 1
if naiveBayes.predict(bayes_probabilities, incoming, sortedIGs,
trainHam / (trainHam + trainSpam),
1 - trainHam / (trainHam + trainSpam),
generalHyperParameters[i]) == incoming[-1]:
correctBayes += 1
if correctBayes > maxBayes:
if __name__ == "__main__":
writer = csv.writer(open("F12.csv", "w", encoding="utf-8", newline=""))
traindataSet, valdataSet = loadDataSet('newTrain2.csv')
testdataSet = loadTestSet('newTest2.csv')
"""
traindataSet = [[1.,2.1, 1.0],
[2.,1.1, 1.0],
[1.3,1., -1.0],
[1.,1., -1.0],
[2.,1., 1.0]
]
"""
trainLabels = [row[-1] for row in traindataSet]
valLabels = [row[-1] for row in valdataSet]
valdataSet = [row[:-1] for row in valdataSet]
for depth in range(10, 11):
for numOfClassifier in range(16, 21):
print("\nnumofClassifier: " + str(numOfClassifier) + " depth: " +
str(depth))
weekCartClassList, trainResult = adaboost.train(
traindataSet, numOfClassifier, depth)
trainF1 = printResult(trainResult, trainLabels)
valResult = adaboost.predict(valdataSet, weekCartClassList)
valF1 = printResult(valResult, valLabels)
# testResult = adaboost.predict(testdataSet, weekCartClassList)
# outputResult(testResult, numOfClassifier, depth, trainF1, 0)
writer.writerow([trainF1, valF1])
from metrics import acc
import numpy as np
cross_validate = True
if __name__ == "__main__":
# First obtain our training and testing data
Xt, Yt, Xv = load_validation_data()
if cross_validate:
# for cross-validation
Xt1, Xt2, Yt1, Yt2 = shuffle_split(Xt, Yt)
classifiers = [
adaboost.train(Xt1, Yt1),
extra_randomized_trees.train(Xt1, Yt1),
gradient_boost.train(Xt1, Yt1),
random_forest.train(Xt1, Yt1),
logistic_regression.train(Xt1, Yt1),
]
# Train another classifier on the ensembles output training predictions
# for each sample in the training data
training_predictions = np.mat(
[[c.predict(sample)[0] for c in classifiers] for sample in Xt1])
meta_classifier = logistic_regression.train(training_predictions, Yt1)
# Check results on training data
print "Accuracy for individual classifiers:", [
def train(data, labels):
learner = lambda d, l: adaboost.train(
stump.random, stump.predict, data=d, labels=l, iters=5000)
return ecoc.train(data, labels, 50, learner, adaboost.predict)
import cascade
train_x, train_y, test_x, test_y = data_loader.load()
train_f, i_f = feature.get_features(train_x)
test_selection_index = np.concatenate(
[range(472),
np.random.choice(19572, 2000, replace=False) + 472])
test_x = test_x[test_selection_index]
test_y = test_y[test_selection_index]
try:
with open("classifier.pkl", "rb") as f:
classifier = pickle.load(f)
except:
classifier = adaboost.train(train_f, train_y, 10)
with open("classifier.pkl", "wb") as f:
pickle.dump(classifier, f, protocol=pickle.HIGHEST_PROTOCOL)
# 0.99, 0.4, 0.01
try:
with open("cascade.pkl", "rb") as f:
cascade_classifier = pickle.load(f)
except:
cascade_classifier = cascade.train_cascade(train_f, train_y, 0.99, 0.4,
0.01)
with open("cascade.pkl", "wb") as f:
pickle.dump(cascade_classifier, f, protocol=pickle.HIGHEST_PROTOCOL)
test_f, i_f = feature.get_features(test_x)
# Designed by Junbo Zhao
# 12/23/2013
# This is a simple demo, training and testing the adaboost classifier
from numpy import *
import data
import adaboost
# The following data files are only used to show you how this program works.
# The two files are generated by function randomData()
# It is better to use your own data to see the power of adaboost!
# Face recognition problems are good for using adaboost.
trainData,label = data.readData('train.txt','train')
#trainData,label = data.loadSimpleData()
testData = data.readData('test.txt','test')
classifier = adaboost.train(trainData,label,150)
adaboost.test(testData,classifier)
input()
from __future__ import print_function,division
import numpy as np
import data
import adaboost
dataMat,labels=data.loadSimpleData()
print("dataMat:",dataMat)
print("labels:",labels)
adaboost.train(dataMat,labels)
from metrics import acc
import numpy as np
cross_validate = True
if __name__ == "__main__":
# First obtain our training and testing data
Xt, Yt, Xv = load_validation_data()
if cross_validate:
# for cross-validation
Xt1, Xt2, Yt1, Yt2 = shuffle_split(Xt, Yt)
classifiers = [
adaboost.train(Xt1, Yt1),
extra_randomized_trees.train(Xt1, Yt1),
gradient_boost.train(Xt1, Yt1),
random_forest.train(Xt1, Yt1),
logistic_regression.train(Xt1, Yt1),
]
# Train another classifier on the ensembles output training predictions
# for each sample in the training data
training_predictions = np.mat([[c.predict(sample)[0] for c in classifiers] for sample in Xt1])
meta_classifier = logistic_regression.train(training_predictions, Yt1)
# Check results on training data
print "Accuracy for individual classifiers:", [acc(Yt2, c.predict(Xt2)) for c in classifiers]
predictions = np.mat([c.predict(Xt2) for c in classifiers]).transpose()