def main():
# Séparer les données et leur cibles
g_donnees = gd.GestionDonnees(d_base)
[types, X, t] = g_donnees.lecture_donnees(d_base)
# Séparer les données pour test et train
x_tr, x_ts, t_tr, t_ts = g_donnees.sep_donnees(X, t)
# Entraînement
debut_e = time.time(
) # Heure de debut pour mesurer le temps d'entraînement
classif.entrainement(x_tr, t_tr, cherche_hyp)
fin_e = time.time() # Heure de fin pour mesurer le temps d'entraînement
print(
'Fin de l\'entrainement. Réalisé en %.2f secondes.' %
(fin_e - debut_e), '\n')
# Prédictions pour les ensembles d'entraînement et de test
predict_tr = classif.prediction(x_tr)
predict_ts = classif.prediction(x_ts)
# Métriques pour évaluer l'entraînement et test
prs_tr, rec_tr, fbeta_tr, _ = metriques(t_tr, predict_tr, average='macro')
prs_ts, rec_ts, fbeta_ts, _ = metriques(t_ts, predict_ts, average='macro')
acc_tr = accu(t_tr, predict_tr)
acc_ts = accu(t_ts, predict_ts)
tab_perform = [['Accuracy', acc_tr, acc_ts],['Précision', prs_tr, prs_ts],\
['Rappel', rec_tr, rec_ts],['F-Beta', fbeta_tr, fbeta_ts]]
print(
tabulate(tab_perform,
headers=['Metrique', 'Train', 'Test'],
floatfmt='.4f'))
return tab_perform
def predict_nb(df):
df = __init__(df)
X_train, X_test = train_test_split(df,
test_size=0.7,
random_state=int(time.time()))
gnb = GaussianNB()
gnb.fit(X_train.values, X_train['gname_num'])
y_pred = gnb.predict(X_test)
accuracy = accu(X_test['gname_num'], y_pred)
print(accuracy)
for i in range(1,20):
C = pow(10,i)
clf = SVC(kernel="rbf",C=C)
clf.fit(features_train,labels_train)
pred = clf.predict(features_test)
print "C:",C,"Accuracy:",acc(pred,labels_test)
C = 10000
clf = SVC(kernel="rbf",C=C)
clf.fit(features_train,labels_train)
pred = clf.predict(features_test)
print "C:",C,"Accuracy:",acc(pred,labels_test)
from sklearn.tree import DecisionTreeClassifier as DTC
from sklearn.metrics import accuracy_score as accu
clf = DTC(min_samples_split=2)
clf.fit(features_train,labels_train)
pred = clf.predict(features_test)
acc = accu(pred,labels_test)
#########################################################
np.expand_dims(y_train_sample, axis=0))
ls += output[0]
ac += output[1]
ls = ls / X_train.shape[0]
ac = ac / X_train.shape[0]
print('epoch', ep, '/', epoch, ', sample', id, '/', len(train_idx),
',', model.metrics_names[0], ls, ',', model.metrics_names[1],
ac)
model.reset_states()
id = id + 1
model.save('../results/model.h5')
#%% validation on training sequence
X_validation = np.reshape(X[sample_idx][0], (1, len(X[sample_idx][0]), 1))
pdt = model.predict_classes(X_validation)
accuracy = accu(pdt[:, :, 0].T, X[sample_idx][1])
print('training accuracy is', accuracy)
#%% validation result plot
plt.figure(figsize=(12, 3))
plt.subplot(121)
plt.plot(pdt[:, :, 0].T)
plt.title('prediction')
plt.subplot(122)
plt.plot(X[sample_idx][1])
plt.title('truth')
plt.figure(figsize=(12, 3))
plt.subplot(121)
plt.plot(pdt[:, :, 0].T)
plt.title('prediction')
plt.xlim([8000, len(pdt[:, :, 0].T)])
y_train = label[:X_train_size * recurr]
y_train = keras.utils.to_categorical(y_train, 2)
y_train = np.reshape(y_train, (X_train_size, recurr, 2), order='C')
# X_train = np.expand_dims(np.expand_dims(seq, axis=0), axis=2)
# y_train = keras.utils.to_categorical(label, 2)
# y_train = np.expand_dims(y_train, axis=0)
loss = model.train_on_batch(X_train, y_train)
print('epoch #', ep, 'processing #', id, model.metrics_names[0],
loss[0], model.metrics_names[1], loss[1])
if 0:
X_validation = np.reshape(seq, (1, len(seq), 1))
pdt_validation = model.predict_classes(X_validation)
ac_validation = accu(pdt_validation.T, label)
print('epoch #', id, 'processing #', id,
'validation accuracy =', ac_validation)
id = id + 1
model.save('../results/model.h5')
#%% validation on training set
ac = 0
id = 0
percent = 0.5
validation_idx = train_idx[:int(len(train_idx) * percent)]
truth = []
result = []
for ind in validation_idx:
seq_validation = X[ind][0]
metrics=['accuracy'])
#%% prepare training data
train_data = []
train_label = []
recurr = 200
cat = 3
for i in range(3, 4): # adjust training images here
XX, yy = utils.reshapeData(X[i], recurr, None) # adjust image size here
X_train, y_train = utils.label_to_cat(XX, yy, cat)
train_data.append(X_train)
train_label.append(y_train)
#%%
epoch = 50
for ep in range(epoch):
for i in range(len(train_data)):
for j in range(train_data[i].shape[0]):
loss = model.train_on_batch(train_data[i][None, j, :, :], train_label[i][None, j, :, :])
print('epoch #', ep, 'processing #', i, model.metrics_names[0], loss[0], model.metrics_names[1], loss[1])
model.reset_states()
model.save(result_path)
#%% validation on training sequence
seq = X[2][0]
label = X[2][1]
X_validation = np.reshape(seq, (1, len(seq), 1))
pdt = model.predict_classes(X_validation)
plt.plot(pdt.T)
plt.plot(label)
plt.imshow()
accuracy = accu(pdt.T, label)
print('training accuracy is', accuracy)
def accuracy(x_test, y_test): #计算准确率
y_predict = predict(x_test)
return accu(y_test, y_predict) #调用acuuracy_score函数计算准确率
#########################################################
### your code goes here ###
from sklearn.svm import SVC
from sklearn.metrics import accuracy_score as acc
for i in range(1, 20):
C = pow(10, i)
clf = SVC(kernel="rbf", C=C)
clf.fit(features_train, labels_train)
pred = clf.predict(features_test)
print "C:", C, "Accuracy:", acc(pred, labels_test)
C = 10000
clf = SVC(kernel="rbf", C=C)
clf.fit(features_train, labels_train)
pred = clf.predict(features_test)
print "C:", C, "Accuracy:", acc(pred, labels_test)
from sklearn.tree import DecisionTreeClassifier as DTC
from sklearn.metrics import accuracy_score as accu
clf = DTC(min_samples_split=2)
clf.fit(features_train, labels_train)
pred = clf.predict(features_test)
acc = accu(pred, labels_test)
#########################################################
# X_train = np.expand_dims(np.expand_dims(seq, axis=0), axis=2)
# y_train = keras.utils.to_categorical(label, 2)
# y_train = np.expand_dims(y_train, axis=0)
# model.train_on_batch(X_train, y_train)
id = id + 1
model.save('../results/model.h5')
#%% validation on training set
ac = 0
id = 0
percent = 0.1
validation_idx = train_idx[:int(len(train_idx) * percent)]
truth = []
result = []
for ind in validation_idx:
seq_validation = X[ind][0]
label_validation = X[ind][1]
truth.append(label_validation)
X_validation = np.reshape(seq_validation, (1, len(seq_validation), 1))
pdt = model.predict_classes(X_validation)
result.append(pdt)
accuracy = accu(pdt.T, label_validation)
print('accuracy for #', id, 'sample =', accuracy, 'sample length =',
len(seq_validation))
ac = ac + accuracy
id = id + 1
ac_avg = ac / len(validation_idx)
print('****************************************************************')
print('average validation accuracy =', ac_avg)
f = open('../../Data/data', 'r')
X = js.load(f)
f.close()
data_size = len(X)
#%%
data_idx = np.load('../../Data/idx.npy')
test_idx = data_idx[1]
train_idx = data_idx[0]
#%%
model = ld('../../results/model.h5')
#%%
ac = 0
id = 0
percent = 0.1
test_idx = test_idx[:int(len(test_idx) * percent)]
truth = []
result = []
for ind in test_idx:
seq_test = X[ind][0]
label_test = X[ind][1]
truth.append(label_test)
X_test = np.reshape(seq_test, (1, len(seq_test), 1))
pdt = model.predict_classes(X_test)
result.append(pdt)
accuracy = accu(pdt.T, label_test)
print('accuracy for #', id, 'sample =', accuracy)
ac = ac + accuracy
id = id + 1
ac_avg = ac / len(test_idx)
print('average test accuracy =', ac_avg)