def evaluate_resampling(X, y, X_test, y_test, clf=None):
"""For evaluating various resampling methods"""
if clf is None:
clf = RandomForestClassifier(n_estimators=400,
random_state=5,
n_jobs=-1)
probas = cross_val_predict(
clf,
X,
y,
cv=StratifiedKFold(n_splits=3),
n_jobs=-1,
method="predict_proba",
verbose=2,
)
pred_indices = np.argmax(probas, axis=1)
classes = np.unique(y)
preds = classes[pred_indices]
print("Cross validation on training data: ")
print("Log loss: {}".format(log_loss(y, probas)))
print("Accuracy: {}".format(balanced_accuracy_score(y, preds)))
print("F1 score: {}".format(f1_score(y, preds, average="micro")))
print("Validation on testing data: ")
clf.fit(X, y)
ytest = clf.predict(X_test)
yprobas_test = clf.predict_proba(X_test)
print("Log loss: {}".format(log_loss(y_test, yprobas_test)))
print("Accuracy: {}".format(balanced_accuracy_score(y_test, ytest)))
print("F1 score: {}".format(f1_score(y_test, ytest, average="micro")))
def all_metrics(num, model, train, test, target, target_test):
""" Calculating metric scores for all models"""
ytrain = model.predict(train)
yprobas = model.predict_proba(train)
ytest = model.predict(test)
yprobas_test = model.predict_proba(test)
logloss_train = log_loss(target, yprobas)
logloss_test = log_loss(target_test, yprobas_test)
print("Training Log Loss: ", logloss_train)
print("Testing Log Loss: ", logloss_test)
acc_train = round(balanced_accuracy_score(target, ytrain) * 100, 3)
acc_test = round(balanced_accuracy_score(target_test, ytest) * 100, 3)
print("Training Accuracy: ", acc_train)
print("Testing Accuracy: ", acc_test)
f1score_train = f1_score(target, ytrain, average="micro")
f1score_test = f1_score(target_test, ytest, average="micro")
print("Training f1 Score: ", f1score_train)
print("Testing f1 Score: ", f1score_test)
def predict_using_random_model(x_test, y_test, x_cv, y_cv):
# We need to generate 9 numbers and the sum of numbers should be 1
# one solution is to genarate 9 numbers and divide each of the numbers by their sum
# ref: https://stackoverflow.com/a/18662466/4084039
test_data_len = x_test.shape[0]
cv_data_len = x_cv.shape[0]
# we create a output array that has exactly same size as the CV data
cv_predicted_y = np.zeros((cv_data_len, 9))
for i in range(cv_data_len):
rand_probs = np.random.rand(1, 9)
cv_predicted_y[i] = (rand_probs / sum(sum(rand_probs)))[0]
print(
"Log loss on Cross Validation Data using Random Model",
log_loss(y_cv, cv_predicted_y, eps=1e-15),
)
# Test-Set error.
# We create a output array that has exactly same as the test data
test_predicted_y = np.zeros((test_data_len, 9))
for i in range(test_data_len):
rand_probs = np.random.rand(1, 9)
test_predicted_y[i] = (rand_probs / sum(sum(rand_probs)))[0]
print(
"Log loss on Test Data using Random Model",
log_loss(y_test, test_predicted_y, eps=1e-15),
)
predicted_y = np.argmax(test_predicted_y, axis=1)
plot_confusion_matrix(y_test, predicted_y + 1)
return predicted_y, y_test
def text_only_model(result, y):
ext_vectorizer = CountVectorizer(
min_df=4
) # In Feature we choose only those words with greater then 3 times occurence
x = text_vectorizer.fit_transform(Result['Text'])
X_tr, X_cv, y_tr, y_cv = cross_validation.train_test_split(Dataset,
y,
test_size=0.3)
X_tr, X_test, y_tr, y_test = cross_validation.train_test_split(
X_tr, y_tr, test_size=0.3)
Dataset = normalize(x, axis=0)
tunes_para = [10**x for x in range(-5, 1)]
cv_array_loss = []
# want to tune for alpha in these code
for i in tunes_para:
print("for alpha =", i)
clf = SGDClassifier(class_weight='balanced',
alpha=i,
penalty='l2',
loss='log',
random_state=42)
clf.fit(X_tr, y_tr)
clf2 = CalibratedClassifierCV(clf, method="sigmoid")
clf2.fit(X_tr, y_tr)
clf2_probs = clf2.predict_proba(X_test)
cv_array_loss.append(
log_loss(y_test, clf2_probs, labels=clf.classes_, eps=1e-15))
# to avoid rounding error while multiplying probabilites we use log-probability estimates
print("Log Loss :", log_loss(y_test, clf2_probs))
def train_boost(booster,
seed,
oversampling=-1.0,
use_tfidf=False,
enable_cv=False,
use_alldata=False,
num_trees=-1):
train, y, features = prepare_train()
if use_tfidf:
print 'Using raw tf-idf sparse matrix ... '
features = 'auto'
train_sparse = sparse.csr_matrix(train.values)
# tfidf_sparse = load_sparse_csr('tfidf_stem_train.npz')
bm25_sparse = load_sparse_csr('bm25_train.npz')
# bm25_sparse = bm25_sparse[404290 - 50000:, :]
# train = sparse.hstack([train_sparse, tfidf_sparse])
# common_words = load_sparse_csr('train_tfidf_commonwords.npz')
# symmdif = load_sparse_csr('train_tfidf_symmdiff.npz')
train = sparse.hstack([train_sparse, bm25_sparse])
del train_sparse, bm25_sparse
print 'Train shape: ', train.shape
if enable_cv:
train, y = shuffle(train, y)
booster.cv(train, y)
exit()
if use_alldata:
print 'Using all data to fit classifier ... '
assert num_trees > 0
results = booster.fit_all(train, y, num_trees, features)
else:
print 'Using train/dev split to fit classifier ... '
X_train, X_eval, y_train, y_eval = train_test_split(train,
y,
stratify=y,
test_size=0.20,
random_state=seed)
if oversampling > 0:
print 'Oversampling X_train, X_eval datasets ... '
X_train, y_train = oversample_sparse(X_train,
y_train,
p=oversampling)
X_eval, y_eval = oversample_sparse(X_eval, y_eval, p=oversampling)
results = booster.fit(X_train, X_eval, y_train, y_eval, features)
y_pred = booster.predict(X_eval)
print log_loss(y_eval, y_pred)
print y_pred
train = None
y = None
del train
del y
return results
def logreg(train,test,cv):
tunes_para=[10 ** x for x in range(-5, 1)]
cv_array_loss=[]
# want to tune for alpha in these code
for i in tunes_para:
print("for alpha =", i)
clf = SGDClassifier(class_weight='balanced',alpha=i,penalty='l2',loss='log',random_state=42)
clf.fit(train,y_tr)
clf2 = CalibratedClassifierCV(clf, method="sigmoid")
clf2.fit(train,y_tr)
clf2_probs = clf2.predict_proba(cv)
cv_array_loss.append(log_loss(y_cv, clf2_probs, labels=clf.classes_, eps=1e-15))
# to avoid rounding error while multiplying probabilites we use log-probability estimates
print("Log Loss :",log_loss(y_cv, clf2_probs))
def get_sgd_lr_model_cross_grid_search():
###logistic regression with hyper parameter tuning
alpha = [10 ** x for x in range(-5, 6)] # hyperparam for SGD classifier.
f1_score_error_array = []
for i in alpha:
clf = SGDClassifier(alpha=i, loss='log', penalty='l2', random_state=42)
lr_clf = OneVsRestClassifier(clf)
lr_clf.fit(xtrain_tfidf, ytrain)
y_pred_new = lr_clf.predict(xval_tfidf)
f1_score_error_array.append(f1_score(yval, y_pred_new, average="micro"))
print('For values of alpha = ', i, "The f1_score is:",
f1_score(yval, y_pred_new, average="micro"))
print('For values of alpha = ', i, "The log-loss is:",
log_loss(yval, y_pred_new, eps=1e-15))
fig, ax = plt.subplots()
ax.plot(alpha, f1_score_error_array, c='g')
for i, txt in enumerate(np.round(f1_score_error_array, 3)):
ax.annotate((alpha[i], np.round(txt, 3)), (alpha[i], f1_score_error_array[i]))
plt.grid()
plt.title("Cross Validation Error for each alpha")
plt.xlabel("Alpha i's")
plt.ylabel("Error measure")
plt.show()
best_alpha = int(np.argmax(f1_score_error_array))
clf = SGDClassifier(alpha=alpha[best_alpha], penalty='l2', loss='log', random_state=42)
lr_clf = OneVsRestClassifier(clf)
lr_clf.fit(xtrain_tfidf, ytrain)
y_pred_new = lr_clf.predict(xval_tfidf)
final_f1_score = f1_score_error_array.append(f1_score(yval, y_pred_new, average="micro"))
print('f1_score from SGDClassifier model after CV grid search is : {}'.format(final_f1_score))
return lr_clf, final_f1_score
def get_scores(y_true,y_pred):
brier_score = brier_score_loss(y_true,y_pred)
log_score = log_loss(y_true,y_pred)
roc_score = roc_auc_score(y_true, y_pred)
pr_score = average_precision_score(y_true,y_pred)
r2score = r2_score(y_true,y_pred)
return math.sqrt(brier_score),log_score,roc_score,pr_score,r2score
def get_scores(shots):
y_true = [shot.result for shot in shots]
y_pred = [shot.pred for shot in shots]
brier_score = brier_score_loss(y_true,y_pred)
log_score = log_loss(y_true,y_pred)
roc_score = roc_auc_score(y_true, y_pred)
pr_score = average_precision_score(y_true,y_pred)
r2score = r2_score(y_true,y_pred)
return math.sqrt(brier_score),log_score,roc_score,pr_score,r2score
def predict_and_plot_confusion_matrix(train_x, train_y, test_x, test_y, clf):
clf.fit(train_x, train_y)
sig_clf = CalibratedClassifierCV(clf, method="sigmoid")
sig_clf.fit(train_x, train_y)
pred_y = sig_clf.predict(test_x)
print("log loss :", log_loss(test_y, sig_clf.predict_proba(test_x)))
print("Number of mis-classified points :",
np.count_nonzero((pred_y - test_y)) / test_y.shape[0])
plot_confusion_matrix(test_y, pred_y)
def predict_and_plot_confusion_matrix(train_x, train_y, test_x, test_y, clf):
clf.fit(train_x, train_y)
sig_clf = CalibratedClassifierCV(clf, method="sigmoid")
sig_clf.fit(train_x, train_y)
pred_y = sig_clf.predict(test_x)
# for calculating log_loss we willl provide the array of probabilities belongs to each class
print("Log loss :", log_loss(test_y, sig_clf.predict_proba(test_x)))
# calculating the number of data points that are misclassified
print("Number of mis-classified points :",
np.count_nonzero((pred_y - test_y)) / test_y.shape[0])
plot_confusion_matrix(test_y, pred_y)
def variation_only_model(X_tr, X_cv, y_tr, y_cv, X_test, y_test):
#Let us do one hot convert of this(for test, train, cv)
gene_vectorizer = CountVectorizer()
train_Variation_feature_onehotCoding = gene_vectorizer.fit_transform(
X_tr['Variation'])
test_Variation_feature_onehotCoding = gene_vectorizer.transform(
X_test['Variation'])
cv_Variation_feature_onehotCoding = gene_vectorizer.transform(
X_cv['Variation'])
tunes_para = [10**x for x in range(-5, 1)]
cv_array_loss = []
# want to tune for alpha in these code
for i in tunes_para:
print("for alpha =", i)
clf = SGDClassifier(class_weight='balanced',
alpha=i,
penalty='l2',
loss='log',
random_state=42)
clf.fit(train_Variation_feature_onehotCoding, y_tr)
clf2 = CalibratedClassifierCV(clf, method="sigmoid")
clf2.fit(train_Variation_feature_onehotCoding, y_tr)
clf2_probs = clf2.predict_proba(cv_Variation_feature_onehotCoding)
cv_array_loss.append(
log_loss(y_cv, clf2_probs, labels=clf.classes_, eps=1e-15))
# to avoid rounding error while multiplying probabilites we use log-probability estimates
print("Log Loss :", log_loss(y_cv, clf2_probs))
clf = SGDClassifier(class_weight='balanced',
alpha=0.001,
penalty='l2',
loss='log',
random_state=42)
clf.fit(train_Variation_feature_onehotCoding, y_tr)
clf2 = CalibratedClassifierCV(clf, method="sigmoid")
clf2.fit(train_Variation_feature_onehotCoding, y_tr)
clf2_probs = clf2.predict_proba(cv_Variation_feature_onehotCoding)
cv_array_loss.append(
log_loss(y_cv, clf2_probs, labels=clf.classes_, eps=1e-15))
# to avoid rounding error while multiplying probabilites we use log-probability estimates
print("Log Loss :", log_loss(y_cv, clf2_probs))
def evaluate_features(X,
y,
X_test,
y_test,
clf=None,
kfold=StratifiedKFold(n_splits=3)):
"""Can be used to evaluate features on training data and testing data;
also compare model performance when specifying clf"""
if clf is None:
clf = RandomForestClassifier(n_estimators=400,
random_state=5,
n_jobs=-1)
probas = cross_val_predict(
clf,
X,
y,
cv=kfold,
n_jobs=-1,
method="predict_proba",
verbose=2,
)
pred_indices = np.argmax(probas, axis=1)
classes = np.unique(y)
preds = classes[pred_indices]
print("Cross validation on training data: ")
print("Log loss: {}".format(log_loss(y, probas)))
print("Accuracy: {}".format(balanced_accuracy_score(y, preds)))
print("MCC: {}".format(f1_score(y, preds, average="micro")))
print("Validation on testing data: ")
clf.fit(X, y)
ytest = clf.predict(X_test)
yprobas_test = clf.predict_proba(X_test)
print("Log loss: {}".format(log_loss(y_test, yprobas_test)))
print("Accuracy: {}".format(balanced_accuracy_score(y_test, ytest)))
print("MCC: {}".format(f1_score(y_test, ytest, average="micro")))
def mea_metrics_calc(num, model, train, test, target, target_test):
""" For the calculation and storage of accuracy and log loss """
global mea_all
ytrain = model.predict(train)
yprobas = model.predict_proba(train)
ytest = model.predict(test)
yprobas_test = model.predict_proba(test)
print("target = ", target[:5])
print("ytrain = ", ytrain[:5])
print("target_test =", target_test[:5])
print("ytest =", ytest[:5])
num_mea = 0
for x in metrics_now:
if x == 1:
# log loss
mea_train = log_loss(target, yprobas)
mea_test = log_loss(target_test, yprobas_test)
elif x == 2:
# accuracy
mea_train = round(balanced_accuracy_score(target, ytrain) * 100, 3)
mea_test = round(
balanced_accuracy_score(target_test, ytest) * 100, 3)
elif x == 3:
# f1 score
mea_train = f1_score(target, ytrain, average="micro")
mea_test = f1_score(target_test, ytest, average="micro")
print("Measure of", metrics_all[x], "for train =", mea_train)
print("Measure of", metrics_all[x], "for test =", mea_test)
mea_all[num_mea].append(mea_train) # train
mea_all[num_mea + 1].append(mea_test) # test
num_mea += 2
return plot_confusion_matrix(model, target_test, ytest)
def find_exclude(self, n_splits=5):
if not self.model_dict or not self.data_dict:
print('Stoped: no models or data')
return None
for c in self.countries:
self.model_dict[c].load_data(data=self.data_dict[c],
balance=self.balances[c])
exclude_list = []
finish = False
logloss_dict = {}
while not finish:
self.model_dict[c].set_exclude_list(exclude_list)
self.model_dict[c].train()
exclude_list_prev = exclude_list.copy()
columns = [
x for x in self.model_dict[c].get_train().columns
if x not in exclude_list_prev
]
exclude_list = [
x for (x, y) in zip(
columns, self.model_dict[c].get_feature_importances())
if y == 0
]
if not exclude_list:
finish = True
exclude_list = exclude_list_prev + exclude_list
logloss_iter = []
splits = self.model_dict[c].data.get_train_valid(
n_splits=n_splits, balance=self.balances[c])
for i in range(0, n_splits):
self.model_dict[c].set_random_seed(i)
train, valid = splits[i]
self.model_dict[c].set_exclude_list(exclude_list)
self.model_dict[c].train(train[0], train[1])
pred = self.model_dict[c].predict(valid[0])
logloss_iter.append(
log_loss(valid[1].astype(int), pred['poor']))
logloss = np.mean(logloss_iter)
logloss_dict[logloss] = exclude_list
print('loglos: {0} exclude length: {1}'.format(
logloss, len(exclude_list)))
self.exclude_dict[c] = logloss_dict[np.min(
list(logloss_dict.keys()))]
print('Country: {0} exclude length: {1}'.format(
c, len(self.exclude_dict.get(c))))
return logloss_dict
def Baseline_model(X_tr, X_cv, y_tr, y_cv, X_test, y_test):
# We need some a list of size 9 which will sum to 1
test_data_len = X_test.shape[0]
cv_data_len = X_cv.shape[0]
# we create a output array that has exactly same size as the CV data
cv_predicted = np.zeros((cv_data_len, 9))
j = 1
for i in range(cv_data_len):
rand_probs = np.random.rand(1, 9) # array of size 9 sum to 1.
cv_predicted[i] = ((rand_probs /
sum(sum(rand_probs))))[0] # Lie between 0 to 1
print("Log Loss at cross-validation step is %d",
log_loss(y_cv, cv_predicted, eps=1e-15))
# we create a output array that has exactly same size as the CV data
test_predicted = np.zeros((test_data_len, 9))
j = 1
for i in range(test_data_len):
rand_probs = np.random.rand(1, 9) # array of size 9 sum to 1.
test_predicted[i] = ((rand_probs /
sum(sum(rand_probs))))[0] # Lie between 0 to 1
print("Log Loss at test step is %d",
log_loss(y_test, test_predicted, eps=1e-15))
def evaluate(config, model, valid_loader, test=False):
model.eval()
loss_fn = nn.CrossEntropyLoss(
weight=torch.tensor(config.class_wts, dtype=torch.float).to(config.device)
)
total_ts_labels = np.array([], dtype=int)
total_ts_preds = np.empty(shape=(0, 9), dtype=int)
avg_ts_loss = tnt.meter.AverageValueMeter()
with torch.no_grad():
for i, batch in enumerate(valid_loader):
batch = [r.to(config.device) for r in batch]
x_batch, y_batch = batch
y_pred = model(x_batch)
loss = loss_fn(y_pred, y_batch)
avg_ts_loss.add(loss.item())
y_pred = F.softmax(y_pred, dim=1).detach().cpu().numpy() # (batch_size, 9)
total_ts_labels = np.append(
total_ts_labels, y_batch.cpu().numpy()
) # (batch_size, 1)
total_ts_preds = np.append(
total_ts_preds, y_pred, axis=0
) # (batch_size, 9)
encoded_ts_labels = pd.get_dummies(total_ts_labels) # (N, 9)
# Accuracy
val_acc = balanced_accuracy_score(
total_ts_labels, total_ts_preds.argmax(axis=1)
) # argmax -> numeric labels (batch_size, 1)
# log loss
val_log_loss = log_loss(encoded_ts_labels, total_ts_preds)
# f1 score
val_f1score = f1_score(
total_ts_labels, total_ts_preds.argmax(axis=1), average="micro"
)
if test == True:
return (
total_ts_labels,
total_ts_preds,
encoded_ts_labels,
avg_ts_loss.value()[0],
val_acc,
val_log_loss,
val_f1score,
)
else:
return avg_ts_loss.value()[0], val_acc, val_log_loss, val_f1score
def do_model(model, X_train, y_train, X_test, y_test, class_weight=None):
if class_weight == 'balanced':
sample_weight = unbalanced_sample_weight(y_train)
else:
sample_weight = None
model.fit(X_train, y_train, sample_weight=sample_weight)
predict_proba = model.predict_proba(X_test)
proba = [x[1] for x in predict_proba]
if class_weight == 'balanced':
sample_weight = unbalanced_sample_weight(y_test)
else:
sample_weight = None
loss = log_loss(y_test, proba, sample_weight=sample_weight)
logger.debug('loss is %f', loss)
return model, loss
def print_metrics(y_true, y_pred):
print('auc:', roc_auc_score(y_true, y_pred))
print('accuracy:', classification.accuracy_score(y_true, y_pred))
confusion_matrix = classification.confusion_matrix(y_true, y_pred)
# print('confusion matrix:')
# print('report:', classification.classification_report(y_true, y_pred))
tn, fp, fn, tp = confusion_matrix.ravel()
sensitivity = tp / (tp + fn)
print('sensitivity: {}'.format(sensitivity))
specificity = tn / (tn + fp)
print('specificity: {}'.format(specificity))
print('precision: {}'.format(tp / (tp + fp)))
total_acc = (tp + tn) / (tp + tn + fp + fn)
random_acc = (((tn + fp) * (tn + fn) + (fn + tp) * (fp + tp)) /
(tp + tn + fp + fn)**2)
kappa = (total_acc - random_acc) / (1 - random_acc)
print('Cohen\'s kappa: {}'.format(kappa))
youdens = sensitivity - (1 - specificity)
print('Youden\'s index: {}'.format(youdens))
print('log loss:', classification.log_loss(y_true, y_pred))
]]
from scipy import sparse
train_q = sparse.hstack([train_vec_1, df3])
train_y = df['is_duplicate']
#========================================
from tqdm.auto import tqdm
from sklearn.calibration import CalibratedClassifierCV
from sklearn.metrics.classification import accuracy_score, log_loss
from sklearn.linear_model import SGDClassifier
#best_alpha = np.argmin(log_error_array)
clf = SGDClassifier(alpha=1, penalty='l2', loss='log', random_state=42)
clf.fit(train_q, train_y)
sig_clf = CalibratedClassifierCV(clf, method="sigmoid")
sig_clf.fit(train_q, train_y)
predict_y = sig_clf.predict_proba(train_q)
print('For values of best alpha = ', 0.1, "The train log loss is:",
log_loss(train_y, predict_y, labels=clf.classes_, eps=1e-15))
predicted_y = np.argmax(predict_y, axis=1)
print(accuracy_score(train_y, predicted_y))
#=================================================
import joblib
joblib.dump(tf_idf_vect, 'tf_idf_vect.pkl')
joblib.dump(sig_clf, 'sig_clf.pkl')
optimizer=None)
gp_fix.fit(X[:train_size], y[:train_size])
gp_opt = GaussianProcessClassifier(kernel=1.0 * RBF(length_scale=1.0))
gp_opt.fit(X[:train_size], y[:train_size])
print("Log Marginal Likelihood (initial): %.3f"
% gp_fix.log_marginal_likelihood(gp_fix.kernel_.theta))
print("Log Marginal Likelihood (optimized): %.3f"
% gp_opt.log_marginal_likelihood(gp_opt.kernel_.theta))
print("Accuracy: %.3f (initial) %.3f (optimized)"
% (accuracy_score(y[:train_size], gp_fix.predict(X[:train_size])),
accuracy_score(y[:train_size], gp_opt.predict(X[:train_size]))))
print("Log-loss: %.3f (initial) %.3f (optimized)"
% (log_loss(y[:train_size], gp_fix.predict_proba(X[:train_size])[:, 1]),
log_loss(y[:train_size], gp_opt.predict_proba(X[:train_size])[:, 1])))
# Plot posteriors
plt.figure(0)
plt.scatter(X[:train_size, 0], y[:train_size], c='k', label="Train data",
edgecolors=(0, 0, 0))
plt.scatter(X[train_size:, 0], y[train_size:], c='g', label="Test data",
edgecolors=(0, 0, 0))
X_ = np.linspace(0, 5, 100)
plt.plot(X_, gp_fix.predict_proba(X_[:, np.newaxis])[:, 1], 'r',
label="Initial kernel: %s" % gp_fix.kernel_)
plt.plot(X_, gp_opt.predict_proba(X_[:, np.newaxis])[:, 1], 'b',
label="Optimized kernel: %s" % gp_opt.kernel_)
plt.xlabel("Feature")
for clf_id, clf in enumerate(base_classifiers):
print "Training base classifier #{0} -- {1}".format(
clf_id, clf.__class__.__name__)
dataset_blend_test_j = np.zeros((XTest.shape[0], N_FOLDS))
for fold_id, (train_indexes, predict_indexes) in enumerate(splits):
print "Fold", fold_id
# Fit on train part
clf.fit(XTrain[train_indexes], YTrain[train_indexes])
# Predict on the rest of data
y_pred = clf.predict(XTrain[predict_indexes])
df_blend_train[predict_indexes, clf_id] = y_pred
lloss = log_loss(YTrain[predict_indexes], y_pred)
oof_loglosses[clf_id, fold_id] = lloss
print 'LogLoss: ', lloss
# Predict on entire test set
dataset_blend_test_j[:, fold_id] = clf.predict(XTest)
# Average predictions for test set
df_blend_test[:, clf_id] = dataset_blend_test_j.mean(1)
print "Out of fold logloss-es:\n", oof_loglosses
np.save('lgbstacking_train_82features.csv', df_blend_train)
np.save('lgbstacking_test_82features.csv', df_blend_test)
# print "\nBlending ..."
def report_log_loss(train_x, train_y, test_x, test_y, clf):
clf.fit(train_x, train_y)
sig_clf = CalibratedClassifierCV(clf, method="sigmoid")
sig_clf.fit(train_x, train_y)
sig_clf_probs = sig_clf.predict_proba(test_x)
return log_loss(test_y, sig_clf_probs, eps=1e-15)
# class_weight=None, warm_start=False, average=False, n_iter=None)
# some of methods
# fit(X, y[, coef_init, intercept_init, …]) Fit linear model with Stochastic Gradient Descent.
# predict(X) Predict class labels for samples in X.
###############################################################################
log_error_array = []
for i in alpha:
clf = SGDClassifier(alpha=i, penalty='l1', loss='hinge', random_state=42)
clf.fit(X_train, y_train)
sig_clf = CalibratedClassifierCV(clf, method="sigmoid")
sig_clf.fit(X_train, y_train)
predict_y = sig_clf.predict_proba(X_test)
log_error_array.append(
log_loss(y_test, predict_y, labels=clf.classes_, eps=1e-15))
print('For values of alpha = ', i, "The log loss is:",
log_loss(y_test, predict_y, labels=clf.classes_, eps=1e-15))
###############################################################################
fig, ax = plt.subplots()
ax.plot(alpha, log_error_array, c='g')
for i, txt in enumerate(np.round(log_error_array, 3)):
ax.annotate((alpha[i], np.round(txt, 3)), (alpha[i], log_error_array[i]))
plt.grid()
plt.title("Cross Validation Error for each alpha")
plt.xlabel("Alpha i's")
plt.ylabel("Error measure")
plt.show()
cv_x_responseCoding.shape)
# ## Naive Bayes
# http://scikit-learn.org/stable/modules/generated/sklearn.naive_bayes.MultinomialNB.html
alpha = [0.00001, 0.0001, 0.001, 0.1, 1, 10, 100, 1000]
cv_log_error_array = []
for i in alpha:
print("for alpha =", i)
clf = MultinomialNB(alpha=i)
clf.fit(train_x_onehotCoding, train_y)
sig_clf = CalibratedClassifierCV(clf, method="sigmoid")
sig_clf.fit(train_x_onehotCoding, train_y)
sig_clf_probs = sig_clf.predict_proba(cv_x_onehotCoding)
cv_log_error_array.append(
log_loss(cv_y, sig_clf_probs, labels=clf.classes_, eps=1e-15))
# to avoid rounding error while multiplying probabilites we use log-probability estimates
print("Log Loss :", log_loss(cv_y, sig_clf_probs))
fig, ax = plt.subplots()
ax.plot(np.log10(alpha), cv_log_error_array, c='g')
for i, txt in enumerate(np.round(cv_log_error_array, 3)):
ax.annotate((alpha[i], str(txt)),
(np.log10(alpha[i]), cv_log_error_array[i]))
plt.grid()
plt.xticks(np.log10(alpha))
plt.title("Cross Validation Error for each alpha")
plt.xlabel("Alpha i's")
plt.ylabel("Error measure")
plt.show()
alpha = [0.000001, 0.00001, 0.0001, 0.001, 0.1, 1, 10, 100, 1000]
cv_log_error_array = []
for i in alpha:
print("for alpha = ", i)
clf = SGDClassifier(class_weight='balanced',
alpha=i,
penalty='l2',
loss='hinge',
random_state=42)
clf.fit(train_df, y_train)
sig_clf = CalibratedClassifierCV(clf, method='sigmoid')
sig_clf.fit(train_df, y_train)
sig_clf_probs = sig_clf.predict_proba(cv_df)
cv_log_error_array.append(
log_loss(y_cv, sig_clf_probs, labels=clf.classes_, eps=1e-15))
print("Log Loss : ", log_loss(y_cv, sig_clf_probs))
best_alpha = np.argmin(cv_log_error_array)
print("The best alpha : ", alpha[best_alpha])
clf = SGDClassifier(class_weight='balanced',
alpha=alpha[best_alpha],
penalty='l2',
loss='hinge',
random_state=42)
clf.fit(train_df, y_train)
sig_clf = CalibratedClassifierCV(clf, method='sigmoid')
sig_clf.fit(train_df, y_train)
sig_clf_probs = sig_clf.predict_proba(train_df)
print("For best alpha, the training log Loss : ",
log_loss(y_train, sig_clf_probs))
print("One hot encoding features :")
print("(number of data points * number of features) in train data = ", train_x_onehotCoding.shape)
print("(number of data points * number of features) in test data = ", test_x_onehotCoding.shape)
print("(number of data points * number of features) in cross validation data =", cv_x_onehotCoding.shape)
alpha=[0.00001, 0.0001, 0.001, 0.1, 1, 10, 100,1000]
cv_log_error_array=[]
for i in alpha:
print("for alpha =", i)
clf=MultinomialNB(alpha=i)
clf.fit(train_x_onehotCoding,train_y)
sig_clf=CalibratedClassifierCV(clf,method="sigmoid")
sig_clf.fit(train_x_onehotCoding,train_y)
sig_clf_probs=sig_clf.predict_proba(cv_x_onehotCoding)
cv_log_error_array.append(log_loss(cv_y,sig_clf_probs,labels=clf.classes_,eps=1e-15))
print("Log Loss :",log_loss(cv_y,sig_clf_probs))
fig,ax=plt.subplots()
ax.plot(np.log10(alpha),cv_log_error_array,c='g')
for i, txt in enumerate(np.round(cv_log_error_array,3)):
ax.annotate((alpha[i],str(txt)), (np.log10(alpha[i]),cv_log_error_array[i]))
plt.grid()
plt.xticks(np.log10(alpha))
plt.title("Cross Validation Error for each alpha")
plt.xlabel("Alpha i's")
plt.ylabel("Error measure")
plt.show()
best_alpha=np.argmin(cv_log_error_array)
clf=MultinomialNB(alpha=alpha[best_alpha])
def logloss(act, pred, class_weight=None):
if class_weight == 'balanced':
sample_weight = unbalanced_sample_weight(act)
else:
sample_weight = None
return log_loss(act, pred, sample_weight=sample_weight)
plt.ylabel('Number of data points')
plt.title('Distribution')
plt.grid()
plt.show()
"""
#check distribution in all sets i.e train ,test,cv and plot graph and find percentage
test_data_len = test_df.shape[0]
cv_data_len = cv_df.shape[0]
#create random model for apllying log loss
cv_predicted_y = np.zeros((cv_data_len, 9))
for i in range(cv_data_len):
rand_probs = np.random.rand(1, 9)
cv_predicted_y[i] = ((rand_probs / sum(sum(rand_probs)))[0])
print("log loss on cv data using random model",
log_loss(y_cv, cv_predicted_y, eps=1e-15))
test_predicted_y = np.zeros((test_data_len, 9))
for i in range(test_data_len):
rand_probs = np.random.rand(1, 9)
test_predicted_y[i] = ((rand_probs / sum(sum(rand_probs)))[0])
print("log loss on test data using random model",
log_loss(y_test, test_predicted_y, eps=1e-15))
predicted_y = np.argmax(test_predicted_y, axis=1)
print(predicted_y)
predicted_y = predicted_y + 1
C = confusion_matrix(y_test, predicted_y)
labels = [1, 2, 3, 4, 5, 6, 7, 8, 9]
inter_cat = df_full['code'].astype('category')
inter_cat = pd.get_dummies(inter_cat)
p1 = pd.DataFrame(inter_cat.iloc[split[0]], index=X.index.values)
result = pd.concat([X, p1], axis=1, ignore_index=True)
p2 = pd.DataFrame(inter_cat.iloc[split[1]],
index=X_test.index.values)
result1 = pd.concat([X_test, p2], axis=1, ignore_index=True)
# Train Logistic regression
logreg = linear_model.LogisticRegression(C=1e5,
penalty='l1',
multi_class='ovr')
logreg.fit(result, y)
clf_probs = logreg.predict_proba(result1)
print("Logistic score", logreg.score(result1, y_true),
log_loss(y_true, clf_probs))
# add to test dataframes
predicted = logreg.predict(result)
df['logreg'] = predicted
predicted = logreg.predict(result1)
dft['logreg'] = predicted
'''
# SVM
# train
logreg = svm.LinearSVC()
logreg.fit(result, y)
print("SVM score", logreg.score(result1, y_true))
# add to test dataframes
optimizer=None)
gp_fix.fit(X[:train_size], y[:train_size])
gp_opt = GaussianProcessClassifier(kernel=1.0 * RBF(length_scale=1.0))
gp_opt.fit(X[:train_size], y[:train_size])
print("Log Marginal Likelihood (initial): %.3f" %
gp_fix.log_marginal_likelihood(gp_fix.kernel_.theta))
print("Log Marginal Likelihood (optimized): %.3f" %
gp_opt.log_marginal_likelihood(gp_opt.kernel_.theta))
print("Accuracy: %.3f (initial) %.3f (optimized)" %
(accuracy_score(y[:train_size], gp_fix.predict(X[:train_size])),
accuracy_score(y[:train_size], gp_opt.predict(X[:train_size]))))
print("Log-loss: %.3f (initial) %.3f (optimized)" %
(log_loss(y[:train_size],
gp_fix.predict_proba(X[:train_size])[:, 1]),
log_loss(y[:train_size],
gp_opt.predict_proba(X[:train_size])[:, 1])))
# Plot posteriors
plt.figure()
plt.scatter(X[:train_size, 0],
y[:train_size],
c='k',
label="Train data",
edgecolors=(0, 0, 0))
plt.scatter(X[train_size:, 0],
y[train_size:],
c='g',
label="Test data",
edgecolors=(0, 0, 0))
def text_only_model(result,y):
ext_vectorizer = CountVectorizer(min_df=4)# In Feature we choose only those words with greater then 3 times occurence
x=text_vectorizer.fit_transform(Result['Text'])
X_tr, X_cv, y_tr, y_cv = cross_validation.train_test_split(Dataset, y, test_size=0.3)
X_tr, X_test, y_tr, y_test = cross_validation.train_test_split(X_tr, y_tr, test_size=0.3)
Dataset=normalize(x,axis=0)
tunes_para=[10 ** x for x in range(-5, 1)]
cv_array_loss=[]
# want to tune for alpha in these code
for i in tunes_para:
print("for alpha =", i)
clf = SGDClassifier(class_weight='balanced',alpha=i,penalty='l2',loss='log',random_state=42)
clf.fit(X_tr,y_tr)
clf2 = CalibratedClassifierCV(clf, method="sigmoid")
clf2.fit(X_tr,y_tr)
clf2_probs = clf2.predict_proba(X_test)
cv_array_loss.append(log_loss(y_test, clf2_probs, labels=clf.classes_, eps=1e-15))
# to avoid rounding error while multiplying probabilites we use log-probability estimates
print("Log Loss :",log_loss(y_test, clf2_probs))
################################################################
def Combine_features(X_tr, X_cv, y_tr, y_cv,X_tr, X_test, y_tr, y_test,result):
#Let us do one hot convert of this(for test, train, cv)
gene_vectorizer = CountVectorizer()
train_gene_feature_onehotCoding = gene_vectorizer.fit_transform(X_tr['Gene'])
test_gene_feature_onehotCoding = gene_vectorizer.transform(X_test['Gene'])
cv_gene_feature_onehotCoding = gene_vectorizer.transform(X_cv['Gene'])
#Let us do one hot convert of this(for test, train, cv)
gene_vectorizer = CountVectorizer()
train_Variation_feature_onehotCoding = gene_vectorizer.fit_transform(X_tr['Variation'])
test_Variation_feature_onehotCoding = gene_vectorizer.transform(X_test['Variation'])
cv_Variation_feature_onehotCoding = gene_vectorizer.transform(X_cv['Variation'])
text_vectorizer = CountVectorizer(min_df=4)# In Feature we choose only those words with greater then 3 times occurence
x=text_vectorizer.fit_transform(Result['Text'])
Dataset=normalize(x,axis=0)
X_tr, X_cv, y_tr, y_cv = cross_validation.train_test_split(Dataset, y, test_size=0.3)
X_tr, X_test, y_tr, y_test = cross_validation.train_test_split(X_tr, y_tr, test_size=0.3)
# Lets print the shape of all the three Features
print(train_gene_feature_onehotCoding.shape)
print(test_gene_feature_onehotCoding.shape)
print(cv_gene_feature_onehotCoding.shape)
# Lets print the shape of all the three Features
print(train_Variation_feature_onehotCoding.shape)
print(test_Variation_feature_onehotCoding.shape)
print(cv_Variation_feature_onehotCoding.shape)
print(X_tr.shape)
print(X_test.shape)
print(X_cv.shape)
X_tr=pd.DataFrame(X_tr.todense())
X_test=pd.DataFrame(X_test.todense())
X_cv=pd.DataFrame(X_cv.todense())
train_Variation_feature_onehotCoding=pd.DataFrame(train_Variation_feature_onehotCoding.todense())
test_Variation_feature_onehotCoding=pd.DataFrame(test_Variation_feature_onehotCoding.todense())
cv_Variation_feature_onehotCoding=pd.DataFrame(cv_Variation_feature_onehotCoding.todense())
train_gene_feature_onehotCoding=pd.DataFrame(train_gene_feature_onehotCoding.todense())
test_gene_feature_onehotCoding=pd.DataFrame(test_gene_feature_onehotCoding.todense())
cv_gene_feature_onehotCoding=pd.DataFrame(cv_gene_feature_onehotCoding.todense())
train = X_tr.join(train_gene_feature_onehotCoding,lsuffix="_X_tr",rsuffix="_train_gene_feature_onehotCoding")
train = train.join(train_Variation_feature_onehotCoding,lsuffix="_train",rsuffix="_train_Variation_feature_onehotCoding")
print(train.shape)
test = X_test.join(test_gene_feature_onehotCoding,lsuffix="_X_test",rsuffix="_test_gene_feature_onehotCoding")
test = test.join(test_Variation_feature_onehotCoding,lsuffix="_test",rsuffix="_test_Variation_feature_onehotCoding")
print(test.shape)
cv = X_cv.join(test_gene_feature_onehotCoding,lsuffix="_X_cv",rsuffix="_cv_gene_feature_onehotCoding")
cv = cv.join(test_Variation_feature_onehotCoding,lsuffix="_cv",rsuffix="_cv_Variation_feature_onehotCoding")
print(cv.shape)
# Before appliing model lets remove all nan value
features=train.columns
pd.options.mode.chained_assignment = None
for i in features:
print("Done")
train[i].fillna(0, inplace=True)
features=test.columns
pd.options.mode.chained_assignment = None
for i in features:
test[i].fillna(0, inplace=True)
features=cv.columns
pd.options.mode.chained_assignment = None
for i in features:
cv[i].fillna(0, inplace=True)
return train,test,cv
##########################################################
def logreg(train,test,cv):
tunes_para=[10 ** x for x in range(-5, 1)]
cv_array_loss=[]
# want to tune for alpha in these code
for i in tunes_para:
print("for alpha =", i)
clf = SGDClassifier(class_weight='balanced',alpha=i,penalty='l2',loss='log',random_state=42)
clf.fit(train,y_tr)
clf2 = CalibratedClassifierCV(clf, method="sigmoid")
clf2.fit(train,y_tr)
clf2_probs = clf2.predict_proba(cv)
cv_array_loss.append(log_loss(y_cv, clf2_probs, labels=clf.classes_, eps=1e-15))
# to avoid rounding error while multiplying probabilites we use log-probability estimates
print("Log Loss :",log_loss(y_cv, clf2_probs))
###########################################################
################################################################
if __name__=="__main__":
main()
nltk.download('stopwords')
stop=set(stopwords.words('english')) #function to clean the word
# Lets see all the stop words
print(stop)
# loading stop words from nltk library
stop_words = set(stopwords.words('english'))
def nlp_preprocessing(total_text, index, column):
if type(total_text) is not int:
string = ""
# replace every special char with space
total_text = re.sub('[^a-zA-Z0-9\n]', ' ', str(total_text))
# replace multiple spaces with single space
total_text = re.sub('\s+',' ', str(total_text))
# converting all the chars into lower-case.
total_text = total_text.lower()
for word in total_text.split():
# if the word is a not a stop word then retain that word from the data
if not word in stop_words:
string += word + " "
data_text[column][index] = string
#text processing stage.
start_time = time.clock()
for index, row in data_text.iterrows():
nlp_preprocessing(row['Text'], index, 'Text')
print('Time took for preprocessing the text :',time.clock() - start_time, "seconds")
#merging both gene_variations and text data based on ID
data = pd.read_csv("training_variants.csv")
result = pd.merge(data, data_text,on='ID', how='left')
result.head()
# Lets split the data into train and test
Result=result
y=result["Class"].values
X_tr, X_cv, y_tr, y_cv = cross_validation.train_test_split(result, y, test_size=0.3)
X_tr, X_test, y_tr, y_test = cross_validation.train_test_split(X_tr, y_tr, test_size=0.3)
#Let us do one hot convert of this(for test, train, cv)
gene_vectorizer = CountVectorizer()
train_gene_feature_onehotCoding = gene_vectorizer.fit_transform(X_tr['Gene'])
test_gene_feature_onehotCoding = gene_vectorizer.transform(X_test['Gene'])
cv_gene_feature_onehotCoding = gene_vectorizer.transform(X_cv['Gene'])
#Let us do one hot convert of this(for test, train, cv)
gene_vectorizer = CountVectorizer()
train_Variation_feature_onehotCoding = gene_vectorizer.fit_transform(X_tr['Variation'])
test_Variation_feature_onehotCoding = gene_vectorizer.transform(X_test['Variation'])
cv_Variation_feature_onehotCoding = gene_vectorizer.transform(X_cv['Variation'])
text_vectorizer = CountVectorizer(min_df=4)# In Feature we choose only those words with greater then 3 times occurence
x=text_vectorizer.fit_transform(Result['Text'])
Dataset=normalize(x,axis=0)
X_tr, X_cv, y_tr, y_cv = cross_validation.train_test_split(Dataset, y, test_size=0.3)
X_tr, X_test, y_tr, y_test = cross_validation.train_test_split(X_tr, y_tr, test_size=0.3)
# Lets print the shape of all the three Features
print(train_gene_feature_onehotCoding.shape)
print(test_gene_feature_onehotCoding.shape)
print(cv_gene_feature_onehotCoding.shape)
# Lets print the shape of all the three Features
print(train_Variation_feature_onehotCoding.shape)
print(test_Variation_feature_onehotCoding.shape)
print(cv_Variation_feature_onehotCoding.shape)
print(X_tr.shape)
print(X_test.shape)
print(X_cv.shape)
X_tr=pd.DataFrame(X_tr.todense())
X_test=pd.DataFrame(X_test.todense())
X_cv=pd.DataFrame(X_cv.todense())
train_Variation_feature_onehotCoding=pd.DataFrame(train_Variation_feature_onehotCoding.todense())
test_Variation_feature_onehotCoding=pd.DataFrame(test_Variation_feature_onehotCoding.todense())
cv_Variation_feature_onehotCoding=pd.DataFrame(cv_Variation_feature_onehotCoding.todense())
train_gene_feature_onehotCoding=pd.DataFrame(train_gene_feature_onehotCoding.todense())
test_gene_feature_onehotCoding=pd.DataFrame(test_gene_feature_onehotCoding.todense())
cv_gene_feature_onehotCoding=pd.DataFrame(cv_gene_feature_onehotCoding.todense())
train = X_tr.join(train_gene_feature_onehotCoding,lsuffix="_X_tr",rsuffix="_train_gene_feature_onehotCoding")
train = train.join(train_Variation_feature_onehotCoding,lsuffix="_train",rsuffix="_train_Variation_feature_onehotCoding")
print(train.shape)
test = X_test.join(test_gene_feature_onehotCoding,lsuffix="_X_test",rsuffix="_test_gene_feature_onehotCoding")
test = test.join(test_Variation_feature_onehotCoding,lsuffix="_test",rsuffix="_test_Variation_feature_onehotCoding")
print(test.shape)
cv = X_cv.join(test_gene_feature_onehotCoding,lsuffix="_X_cv",rsuffix="_cv_gene_feature_onehotCoding")
cv = cv.join(test_Variation_feature_onehotCoding,lsuffix="_cv",rsuffix="_cv_Variation_feature_onehotCoding")
print(cv.shape)
features=train.columns
pd.options.mode.chained_assignment = None
for i in features:
print("Done")
train[i].fillna(0, inplace=True)
features=test.columns
pd.options.mode.chained_assignment = None
for i in features:
test[i].fillna(0, inplace=True)
features=cv.columns
pd.options.mode.chained_assignment = None
for i in features:
cv[i].fillna(0, inplace=True)
print(cv.shape)
train.to_csv("rtrain.csv")
test.to_csv("rtest.csv")
cv.to_csv("rcv.csv")
tunes_para=[10 ** x for x in range(-5, 1)]
cv_array_loss=[]
# want to tune for alpha in these code
for i in tunes_para:
print("for alpha =", i)
clf = SGDClassifier(class_weight='balanced',alpha=i,penalty='l2',loss='log',random_state=42)
clf.fit(train,y_tr)
clf2 = CalibratedClassifierCV(clf, method="sigmoid")
clf2.fit(train,y_tr)
clf2_probs = clf2.predict_proba(cv)
cv_array_loss.append(log_loss(y_cv, clf2_probs, labels=clf.classes_, eps=1e-15))
# to avoid rounding error while multiplying probabilites we use log-probability estimates
print("Log Loss :",log_loss(y_cv, clf2_probs))
from sklearn.metrics.classification import (hamming_loss, log_loss)
# binary class
y_pred = [1, 2, 3, 4]
y_true = [1, 2, 3, 4]
y_true = [2, 2, 3, 4]
y_true = [5, 6, 7, 8]
hamming_loss(y_true, y_pred)
hamming_loss(list("ABFD"), list("ABCD"))
#multi class
hamming_loss(np.array([[0, 1], [1, 1]]), np.zeros((2, 2)))
y_true = [0, 0, 1, 1]
y_pred = [[.9, .1], [.8, .2], [.3, .7], [.01, .99]] # [Pr(0), Pr(1)]
log_loss(y_true, y_pred)
"""
Receiver operating characteristic (ROC) Curve
roc_curve?
roc_curve(y_true, y_score, pos_label=None,
sample_weight=None, drop_intermediate=True)
Note: this implementation is restricted to the binary classification task.
y_true : array, shape = [n_samples]
True binary labels in range {0, 1} or {-1, 1}. If labels are not
binary, pos_label should be explicitly given.
y_score : array, shape = [n_samples]
Target scores, can either be probability estimates of the positive
class, confidence values, or non-thresholded measure of decisions
def h2o_log_loss(y_actual, y_predict, eps=1e-15, normalize=True, sample_weight=None, y_type=None):
"""Log loss, aka logistic loss or cross-entropy loss.
This is the loss function used in (multinomial) logistic regression
and extensions of it such as neural networks, defined as the negative
log-likelihood of the true labels given a probabilistic classifier's
predictions. The log loss is only defined for two or more labels.
For a single sample with true label yt in {0,1} and
estimated probability yp that yt = 1, the log loss is
-log P(yt|yp) = -(yt log(yp) + (1 - yt) log(1 - yp))
This method is adapted from the ``sklearn.metrics.classification.log_loss``
function for use with ``H2OFrame``s in skutil.
Parameters
----------
y_actual : ``H2OFrame``, shape=(n_samples,)
The one-dimensional ground truth
y_predict : ``H2OFrame``, shape=(n_samples, [n_classes])
The predicted labels. Can represent a matrix. If
``y_predict.shape = (n_samples,)`` the probabilities provided
are assumed to be that of the positive class. The labels in
``y_predict`` are assumed to be ordered ordinally.
eps : float, optional (default=1e-15)
Log loss is undefined for p=0 or p=1, so probabilities are
clipped to max(eps, min(1 - eps, p)).
normalize : bool, optional (default=True)
If true, return the mean loss per sample.
Otherwise, return the sum of the per-sample losses.
sample_weight : H2OFrame or float, optional (default=None)
A frame of sample weights of matching dims with
y_actual and y_predict.
y_type : string, optional (default=None)
The type of the column. If None, will be determined.
Returns
-------
loss : float
Notes
-----
The logarithm used is the natural logarithm (base-e).
"""
# SKIP THESE FOR NOW, SINCE VALIDATED IN SKLEARN PORTION
# y_type, y_actual, y_predict = _check_targets(y_actual, y_predict, y_type)
# _err_for_continuous(y_type) # this is restricted to classification tasks
if sample_weight is not None:
if isinstance(sample_weight, H2OFrame):
_, _, sample_weight = _check_targets(y_actual, sample_weight, 'unknown') # we don't care about y_type here
sample_weight = h2o_col_to_numpy(sample_weight)
# else we just duck type it later
# todo: do this better someday
y_actual = h2o_col_to_numpy(y_actual) # this is supposed to be a ONE-dim vector
y_predict = y_predict.as_data_frame(use_pandas=True).as_matrix() # this might be 2-dim
# if it's a column, make it a vector.
if len(y_predict.shape) == 2 and y_predict.shape[1] == 1:
y_predict = y_predict.T[0]
return log_loss(y_actual, y_predict, eps=eps,
normalize=normalize,
sample_weight=sample_weight)
