def version2(): # Data cleaning in NLP Model
corpus = []
for i in range(0, 527383):
review = re.sub(
'[^a-zA-Z]', ' ',
df.iloc[i,
1]) # Removing all elements except words from all reviews
review = review.lower()
review = review.split()
review = [
word for word in review if not word in set(sw.words('english'))
]
stammer = ps()
review = [stammer.stem(word) for word in review]
review = " ".join(review)
corpus.append(review)
features = cv().fit_transform(corpus)
labels = df.iloc[:, -1]
train_test_split(features, labels, 100)
features_test_vectorized = cv().transform(features_test)
features_train_vectorized = cv().fit_transform(features_train)
model = lr().fit(features_train_vectorized, labels_train)
predictions = model.predict(features_test_vectorized)
ras(labels_test, predictions)
cm(labels_test, predictions)
return model
def version1(): # Logistic Regression Model
train_test_split(df["reviewText"], df["Positivity"], 100)
features_train_vectorized = cv().fit_transform(features_train)
features_test_vectorized = cv().transform(features_test)
model = lr().fit(features_train_vectorized,
labels_train) # Model creation for logistic regression
predictions = model.predict(features_test_vectorized)
ras(labels_test, predictions) # Generating prediction score
cm(labels_test, predictions)
return model
def version3(): # TF_IDF Model
global vect
train_test_split(df["reviewText"], df["Positivity"], 100)
vect = TfidfVectorizer(min_df=5)
features_train_vectorized = vect.fit_transform(features_train)
features_test_vectorized = vect.transform(features_test)
model = lr().fit(features_train_vectorized, labels_train)
predictions = model.predict(features_test_vectorized)
ras(labels_test, predictions)
cm(labels_test, predictions)
return model
def roc_scores(data):
y = data
rocs = pandas.Series()
for c in y.columns.values[1:]:
temp1 = ras(y['true'], y[c])
rocs.set_value(c,temp1)
# temp = pandas.Series([temp1], index=[c])
# rocs = rocs.append(temp) # also works fine
return rocs
def dfauc(x):
y = 0
length = len(df)
for i in range(len(df)):
if i == 0:
average = np.multiply(x[i], df[i].target.values)
y = y + x[i]
elif i < (len(df) - 1):
average = average + np.multiply(x[i], df[i].target.values)
y = y + x[i]
else:
average = average + np.multiply(1 - y, df[i].target.values)
auc_score = ras(df[i].ref.values, average)
return -1 * auc_score
]
totalScores = np.zeros(7)
for subject in subjects:
scores = np.zeros(7)
print 'calculating scores for subject: ' + str(subject)
for serie in series:
data = pd.read_csv(
'SVM_results_binary_allCSP/subj%d_series%d_results.csv' %
(subject, serie))
data = np.array(data[data.columns[1:]])
truth = pd.read_csv('input/train/subj%d_series%d_events.csv' %
(subject, serie))
truth = np.array(truth[cols])
for i in range(0, 6):
scores[i] += ras(truth[:, i], data[:, i])
scores[6] += ras(truth, data, average='macro')
scores = np.true_divide(scores, len(series))
totalScores += scores
print 'Writing scores for subject: ' + str(subject)
f = open('SVM_scores/subj%d_mean_scores.txt' % (subject), 'w')
f.write('Average AUC score: {}\n'.format(scores[6]))
f.write('Scores by Event:\n')
f.write('{0:>20} {1:>20} {2:>20} {3:>20} {4:>20} {5:>20}'.format(
cols[0], cols[1], cols[2], cols[3], cols[4], cols[5]))
f.write('\n')
f.write('{0:20.5} {1:20.5} {2:20.5} {3:20.5} {4:20.5} {5:20.5}'.format(
scores[0], scores[1], scores[2], scores[3], scores[4], scores[5]))
def auc_roc(y_orig, x_orig, w):
y_predicted = np.dot(x_orig, w.reshape(w.size, 1))
return ras(y_orig, y_predicted)
sess.run(cross_entropy,
feed_dict={
prob: 1.0,
x: xtr[i - 100:i],
y_: ytr[i - 100:i]
}))
feed_dict = {x: xte, y_: yte, prob: 1.0}
ac = sess.run(acc, feed_dict=feed_dict)
print("Acc:", ac)
'''print('Test Acc: %g' % acc.eval())
print('Train Acc: %g' % acc.eval(feed_dict={
x: xtr,
y_: ytr,
prob: 1.0}))'''
# y_true = sess.run(tf.argmax(y_,1), feed_dict={y_:yte, prob:1.0})
# y_score = sess.run(tf.argmax(y_conv,1), feed_dict={x:xte, prob:1.0})
a = sess.run(y_, feed_dict={y_: yte, prob: 1.0})
b = sess.run(y_conv, feed_dict={x: xte, prob: 1.0})
rass = ras(a, b)
print('AUC(ROC):', rass)
plot.append([ac, ras])
# ka.append(sess.run(acc, feed_dict={x:xtr, y_:ytr, prob:1.0}))
# kb.append(sess.run(acc, feed_dict={x:xte, y_:yte, prob:1.0}))
# kc.append(rass)
writer.add_graph(sess.graph)
saver.save(sess, 'Model1/cnn')
print('Done.')
import pandas as pd
import sys
import numpy as np
from sklearn.metrics import roc_auc_score as ras
results_file = sys.argv[1]
truth_file = sys.argv[2]
out = sys.argv[3]
results = pd.read_csv(results_file)
truth = pd.read_csv(truth_file)
cols = np.array(truth.columns[1:])
scores = np.empty(6)
for i in range(0, 6):
scores[i] = ras(np.array(truth[cols[i]]), np.array(results[cols[i]]))
avg_score = ras(truth[cols], results[cols], average='macro')
f = open(out, 'w')
f.write('Average AUC score: ' + str(avg_score) + '\n')
f.write('Scores by Event:\n')
f.write('{0:>20} {1:>20} {2:>20} {3:>20} {4:>20} {5:>20}'.format(
cols[0], cols[1], cols[2], cols[3], cols[4], cols[5]))
f.write('\n')
f.write('{0:20.5} {1:20.5} {2:20.5} {3:20.5} {4:20.5} {5:20.5}'.format(
scores[0], scores[1], scores[2], scores[3], scores[4], scores[5]))
# Use first the file data_adjsutments.py to work with the variables.
# Now lets optimize the model
from sklearn.ensemble import RandomForestRegressor as rfr
from sklearn.metrics import roc_auc_score as ras
#First, number of estimators
results = []
n_estimator_option = [100, 250, 300, 700]
for trees in n_estimator_option:
model = rfr(trees, oob_score=True, random_state=42)
model.fit(X_train, Y_train)
print trees, 'trees'
roc = ras(Y_train, model.oob_prediction_)
print 'c-stat:', roc
results.append(roc)
print ""
pd.Series(results, n_estimator_option).plot()
# n_estimator_option = 300 is the highest. Let's use it
#%%
results = []
max_feature_option = ['auto', None, "sqrt", "log2", 0.9, 0.2]
for max_feature in max_feature_option:
model = rfr(n_estimators=300,
sum1 = sum1 + y[i] * x1[i] * (
1 - (1 / (1 + np.exp(-y[i] * (w1 * x1[i] + w2 * x2[i])))))
sum2 = sum2 + y[i] * x2[i] * (
1 - (1 / (1 + np.exp(-y[i] * (w1 * x1[i] + w2 * x2[i])))))
w1 = w1 + k / 205 * sum1 - k * c * w1
w2 = w2 + k / 205 * sum2 - k * c * w2
itter += 1
print(w1, w2, itter)
return w1, w2
def sigma(w1, w2, x1, x2):
p = 1 / (1 + np.exp(-w1 * x1[i] - w2 * x2[i]))
return p
pvect = []
w1, w2 = weights(0, 0, 0.1, 10)
print(w1, w2)
for i in range(205):
pvect.append(sigma(w1, w2, x1, x2))
# print(sigma(w1,w2,x1,x2))
y_true = np.array(y)
y_scores = np.array(pvect)
print(ras(y_true, y_scores), 'jopa')
#print(func(w1,w2,y,x1,x2))
def create_and_predict(data, **kwargs):
"""
kwargs:
neurons=32
epochs=50
learning_rate=0.01
batch_size=32
plot=False
"""
#
# 1) Initialize
act = 'relu'
architecture = [
Dense(
kwargs.get('neurons', 32),
input_shape=(2, ),
activation=act,
),
Dense(
kwargs.get('neurons', 32),
activation=act,
),
#Dense(
# kwargs.get('neurons',32),
# activation=act,),
Dense(1, activation='sigmoid'),
]
model = Sequential(architecture)
model.compile(
optimizer=SGD(learning_rate=kwargs.get('learning_rate', .01)),
loss='mean_squared_error',
metrics='accuracy',
)
#
# 2) Fit
results = model.fit(
*data['train'],
batch_size=kwargs.get('batch_size', 32),
epochs=kwargs.get('epochs', 50),
verbose=1,
callbacks=[EarlyStopping()],
validation_data=data['val'],
)
#
# 3) return results
results = results.history
results['ytrue_val'] = data['val'][1]
results['ytrue_test'] = data['test'][1]
results['ypred_val'] = model.predict(data['val'][0])
results['ypred_test'] = model.predict(data['test'][0])
results['specs'] = kwargs
#
if kwargs.get('plot', False):
case = 'test'
from sklearn.linear_model import LogisticRegression as lr
f, ax = plt.subplots(1, 3, figsize=(20, 7))
fpr, tpr, treshold = roc_curve(results['ytrue_' + case],
results['ypred_' + case])
ax[0].plot(
tuple(fpr),
tuple(tpr),
label='NN AUC ' + str(
round(ras(results['ytrue_' + case], results['ypred_' + case]),
2)))
if False:
# Logistic Regression
newytrue, newypred = data[case][1], lr(max_iter=5000).fit(
*data['train']).predict_proba(data[case][0])[:, 1]
fpr2, tpr2, treshold = roc_curve(newytrue, newypred)
ax[0].plot(tuple(fpr2),
tuple(tpr2),
label='Logistic AUC ' +
str(round(ras(newytrue, newypred), 2)))
ax[0].set_title('ROC curve')
ax[0].legend()
weights = {0: [], 1: []}
for i, x in enumerate(results['ypred_' + case]):
weights[data[case][1][i][0]] += [x[0]]
series = range(1,9)
#["hand"start","secondThing"....."Average of all"]
cols = ['HandStart','FirstDigitTouch','BothStartLoadPhase','LiftOff','Replace','BothReleased']
totalScores = np.zeros(7)
for subject in subjects:
scores = np.zeros(7)
print 'calculating scores for subject: ' + str(subject)
for serie in series:
data = pd.read_csv('SVM_results_binary_allCSP/subj%d_series%d_results.csv'%(subject, serie))
data = np.array(data[data.columns[1:]])
truth = pd.read_csv('input/train/subj%d_series%d_events.csv'%(subject, serie))
truth = np.array(truth[cols])
for i in range(0,6):
scores[i] += ras(truth[:,i], data[:,i])
scores[6] += ras(truth, data, average='macro')
scores = np.true_divide(scores, len(series))
totalScores += scores
print 'Writing scores for subject: ' + str(subject)
f = open('SVM_scores/subj%d_mean_scores.txt'%(subject), 'w')
f.write('Average AUC score: {}\n'.format(scores[6]))
f.write('Scores by Event:\n')
f.write('{0:>20} {1:>20} {2:>20} {3:>20} {4:>20} {5:>20}'.format(cols[0], cols[1], cols[2], cols[3], cols[4], cols[5]))
f.write('\n')
f.write('{0:20.5} {1:20.5} {2:20.5} {3:20.5} {4:20.5} {5:20.5}'.format(scores[0], scores[1], scores[2], scores[3], scores[4], scores[5]))
print 'Calculating overall mean scores'
# calculates scores for a given prediction file, against the given truth file. third parameter is the output file name
import pandas as pd
import sys
import numpy as np
from sklearn.metrics import roc_auc_score as ras
results_file = sys.argv[1]
truth_file = sys.argv[2]
out = sys.argv[3]
results = pd.read_csv(results_file)
truth = pd.read_csv(truth_file)
cols = np.array(truth.columns[1:])
scores = np.empty(6)
for i in range(0,6):
scores[i] = ras(np.array(truth[cols[i]]), np.array(results[cols[i]]))
avg_score = ras(truth[cols], results[cols], average='macro')
f=open(out, 'w')
f.write('Average AUC score: ' + str(avg_score) + '\n')
f.write('Scores by Event:\n')
f.write('{0:>20} {1:>20} {2:>20} {3:>20} {4:>20} {5:>20}'.format(cols[0], cols[1], cols[2], cols[3], cols[4], cols[5]))
f.write('\n')
f.write('{0:20.5} {1:20.5} {2:20.5} {3:20.5} {4:20.5} {5:20.5}'.format(scores[0], scores[1], scores[2], scores[3], scores[4], scores[5]))
i = 0
for train_index, validation_index in kf.split(X_train_norm):
X_tra, X_val = X_train_norm.ix[train_index, :], X_train_norm.ix[
validation_index, :]
y_tra, y_val = y_train.ix[train_index], y_train.ix[validation_index]
clf = clf.fit(X_tra, y_tra['Gravedad'])
prediction = clf.predict(X_val)
Acc.ix[i] = np.mean(np.array(y_val).T == prediction)
feat_imp.ix[:, i] = clf.feature_importances_
i += 1
Acc_final_rf = np.mean(Acc)
feat_imp = np.mean(feat_imp, axis=1)
lista1, ordered_feat = zip(*sorted(zip(feat_imp, features), reverse=True))
final = clf.predict(X_test_norm)
Acc_test[j] = np.mean(final == y_test)
AUC[j] = ras(y_test, final, average='macro')
del clf, kf, Acc
# Final results:
auc = AUC.copy()
Acc_test.mean()
Acc_test.std()
plt.figure()
plt.plot(range(1, 101), Acc_test)
plt.plot(range(1, 101), np.tile(Acc_test.mean(), len(Acc_test)), c='r')
plt.plot(range(1, 101),
np.tile(Acc_test.mean() + Acc_test.std(), len(Acc_test)),
c='r',
ls='--')
plt.plot(range(1, 101),
