def bagging_pasting(X_train, X_val, y_train, y_val, doplot=False):
from sklearn.ensemble import BaggingClassifier
from sklearn.tree import DecisionTreeClassifier
from sklearn.metrics import accuracy_score
tree_clf = DecisionTreeClassifier(random_state=42)
tree_clf.fit(X_train, y_train)
y_pred_tree = tree_clf.predict(X_val)
print("DecisionTree classifier, accuracy score = %f\n" %
accuracy_score(y_val, y_pred_tree))
bag_clf = BaggingClassifier(base_estimator=DecisionTreeClassifier(),
n_estimators=500,
max_samples=100,
bootstrap=True,
n_jobs=1,
oob_score=True)
bag_clf.fit(X_train, y_train)
y_pred = bag_clf.predict(X_val)
print("Bagging classifier, accuracy score = %f\n" %
accuracy_score(y_val, y_pred))
if doplot:
from utils import plot_decision_boundary, save_fig
plt.figure(figsize=(11, 4))
plt.subplot(121)
plot_decision_boundary(tree_clf, X, y)
plt.title("Decision Tree", fontsize=14)
plt.subplot(122)
plot_decision_boundary(bag_clf, X, y)
plt.title("Decision Trees with Bagging", fontsize=14)
save_fig("DT_without_and_with_bagging_plot", CHAPTER_ID)
plt.show()
def visualize_k_fold_roc_plot(X, y_gold, classifier, K):
"""
Visualizes K ROC curves created from K-fold cross validation and the mean ROC curve.
Keyword arguments:
X -- The feature vectors
y_gold_standard -- Expected labels.
classifier -- The classifier to be used
K -- Number of folds to perform
"""
cross_validation = StratifiedKFold(y_gold, n_folds=K)
mean_true_positive_rate = 0.0
mean_false_positive_rate = 0.0
for i, (train, test) in enumerate(cross_validation):
#classify
classifier.fit(X[train], y_gold[train])
y_predicted = classifier.predict(X[test])
#compute ROC
false_positive_rate, true_positive_rate, thresholds = roc_curve(
y_gold[test], y_predicted)
roc_auc = auc(false_positive_rate, true_positive_rate)
plt.plot(false_positive_rate,
true_positive_rate,
linewidth=1,
label='ROC fold %d (area = %0.2f)' % (i + 1, roc_auc))
#save means
mean_true_positive_rate += true_positive_rate
mean_false_positive_rate += false_positive_rate
#compute final mean
mean_true_positive_rate /= len(cross_validation)
mean_false_positive_rate /= len(cross_validation)
mean_auc = auc(mean_false_positive_rate, mean_true_positive_rate)
plt.plot(mean_false_positive_rate,
mean_true_positive_rate,
'k--',
label='Mean ROC (area = %0.2f)' % mean_auc,
linewidth=2)
plt.plot([0, 1], [0, 1],
'--',
color=(0.6, 0.6, 0.6),
label='Random Classifier')
plt.xlabel('False Positive Rate')
plt.ylabel('True Positive Rate')
plt.title('Receiver Operating Characteristic (ROC) Curve')
plt.legend(loc="lower right")
# plt.show()
#save fig
output_dir = 'img'
save_fig(output_dir, '{}/roc.png'.format(output_dir))
plt.close()
def visualize_feature_boxplot(X,y,selected_feature,features):
"""
Visualize the boxplot of a feature
Keyword arguments:
X -- The feature vectors
y -- The target vector
selected_feature -- The desired feature to obtain the histogram
features -- Vector of feature names (X1 to XN)
"""
#create data
joint_data=np.column_stack((X,y))
column_names=features
#create dataframe
df=pd.DataFrame(data=joint_data,columns=column_names)
# palette = sea.hls_palette()
splot=sea.boxplot(data=df,x='Y',y=selected_feature,hue="Y",palette="husl")
plt.title('BoxPlot Distribution of '+selected_feature)
#save fig
output_dir = "img"
save_fig(output_dir,'{}/{}_boxplot.png'.format(output_dir,selected_feature))
def make_record_alg_cmp_bar(path, serv, operations, ylabel, stats):
labels = list(stats.keys())
xtickslabels = deepcopy(stats[next(iter(stats))]['keys'])
if serv != 'conf' and serv != 'int':
for i, val in enumerate(xtickslabels):
xtickslabels[i] = settings.sec_str[int(val)]
for op in operations:
fig, ax = plt.subplots(1, 1, figsize=(30, 10))
y = []
yerr = []
for key in stats:
y.append(stats[key]['mean_' + ylabel + '_' + op])
yerr.append(stats[key]['stddev_' + ylabel + '_' + op])
ax = utils.multiple_custom_bar(y,
yerr,
ax,
title=op + ' (mean)',
labels=labels,
xtickslabels=xtickslabels,
xlabel='security strength (in bits)',
ylabel=ylabel)
utils.save_fig(
fig, 'statistics/' + path + '/serv_' + serv + '_' + op + '_' +
ylabel + '.png')
def visualize_lda2D(X,y):
"""
Visualize the separation between classes using the two most discriminant features
Keyword arguments:
X -- The feature vectors
y -- The target vector
"""
labels=['Paid','Default']
lda = LDA(n_components = 2,solver='eigen')
# lda = LDA(n_components = 2)
discriminative_attributes = lda.fit(X, y).transform(X)
palette = sea.color_palette()
# plt.plot(discriminative_attributes[:,0][y==0],'sg',label="Paid", alpha=0.5)
# plt.plot(discriminative_attributes[:,0][y==1],'^r',label="Default", alpha=0.5)
plt.scatter(discriminative_attributes[:,0][y==0],discriminative_attributes[:,1][y==0],marker='s',color='green',label="Paid", alpha=0.5)
plt.scatter(discriminative_attributes[:,0][y==1],discriminative_attributes[:,1][y==1],marker='^',color='red',label="Default", alpha=0.5)
plt.xlabel('First Linear Discriminant')
plt.ylabel('Second Linear Discriminant')
leg = plt.legend(loc='upper right', fancybox=True)
leg.get_frame().set_alpha(0.5)
plt.title("Linear Discriminant Analysis")
plt.tight_layout
#save fig
output_dir='img'
save_fig(output_dir,'{}/lda.png'.format(output_dir))
def plot_hist(baseline_samples, target_samples, true_x, true_y):
baseline_samples = baseline_samples.squeeze()
target_samples = target_samples.squeeze()
bmin, bmax = baseline_samples.min(), baseline_samples.max()
ax = sns.kdeplot(baseline_samples, shade=True, color=(0.6, 0.1, 0.1, 0.2))
ax = sns.kdeplot(target_samples, shade=True, color=(0.1, 0.1, 0.6, 0.2))
ax.set_xlim(bmin, bmax)
y0, y1 = ax.get_ylim()
plt.plot([true_y, true_y], [0, y1 - (y1 - y0) * 0.01],
linewidth=1,
color='r')
plt.title('Predictive' +
(f' at {true_x:.2f}' if true_x is not None else ''))
fig = plt.gcf()
fig.set_size_inches(9, 9)
# plt.tight_layout() # pad=0.4, w_pad=0.5, h_pad=1.0)
name = utils.DATA_DIR.replace('/', '-')
# plt.tight_layout(pad=0.6)
utils.save_fig('predictive-at-point-' + name)
def visualize_feature_boxplot(X, y, selected_feature, features):
"""
Visualize the boxplot of a feature
Keyword arguments:
X -- The feature vectors
y -- The target vector
selected_feature -- The desired feature to obtain the histogram
features -- Vector of feature names (X1 to XN)
"""
#create data
joint_data = np.column_stack((X, y))
column_names = features
#create dataframe
df = pd.DataFrame(data=joint_data, columns=column_names)
# palette = sea.hls_palette()
splot = sea.boxplot(data=df,
x='Y',
y=selected_feature,
hue="Y",
palette="husl")
plt.title('BoxPlot Distribution of ' + selected_feature)
#save fig
output_dir = "img"
save_fig(output_dir, '{}/{}_boxplot.png'.format(output_dir,
selected_feature))
def callback(X_next, Y_next, i):
global X_sample, Y_sample
# Plot samples, surrogate function, noise-free objective and next sampling location
#plt.subplot(n_iter, 2, 2 * i + 1)
plt.figure()
plot_approximation(gpr,
X,
Y,
X_sample,
Y_sample,
X_next,
show_legend=i == 0)
plt.title(f'Iteration {i+1}')
if save_figures: save_fig('bayes-opt-surrogate-{}.pdf'.format(i + 1))
plt.show()
plt.figure()
#plt.subplot(n_iter, 2, 2 * i + 2)
plot_acquisition(X,
expected_improvement(X, X_sample, Y_sample, gpr),
X_next,
show_legend=i == 0)
if save_figures: save_fig('bayes-opt-acquisition-{}.pdf'.format(i + 1))
plt.show()
# Add sample to previous samples
X_sample = np.append(X_sample, np.atleast_2d(X_next), axis=0)
Y_sample = np.append(Y_sample, np.atleast_2d(Y_next), axis=0)
def visualize_hist_pairplot(X,y,selected_feature1,selected_feature2,features,diag_kind):
"""
Visualize the pairwise relationships (Histograms and Density Funcions) between classes and respective attributes
Keyword arguments:
X -- The feature vectors
y -- The target vector
selected_feature1 - First feature
selected_feature1 - Second feature
diag_kind -- Type of plot in the diagonal (Histogram or Density Function)
"""
#create data
joint_data=np.column_stack((X,y))
column_names=features
#create dataframe
df=pd.DataFrame(data=joint_data,columns=column_names)
#plot
palette = sea.hls_palette()
splot=sea.pairplot(df, hue="Y", palette={0:palette[2],1:palette[0]},vars=[selected_feature1,selected_feature2],diag_kind=diag_kind)
splot.fig.suptitle('Pairwise relationship: '+selected_feature1+" vs "+selected_feature2)
splot.set(xticklabels=[])
# plt.subplots_adjust(right=0.94, top=0.94)
#save fig
output_dir = "img"
save_fig(output_dir,'{}/{}_{}_hist_pairplot.png'.format(output_dir,selected_feature1,selected_feature2))
def generate_histograms(start_feature, end_feature, features_base):
num_weeks = 15
num_features = end_feature - start_feature +1
in_file = "data/%s.csv" % features_base
feature_set = validate_csv(in_file)
start_time = time.time()
data = np.genfromtxt(in_file, delimiter = ',', skip_header = 1)
print "loaded data in", time.time() - start_time, "seconds"
pl.clf()
dropout_vector = data[:, 1]
for feature_index in range(start_feature, end_feature + 1):
feature_distribution = data[:, feature_index]
start_time = time.time()
m1 = feature_distribution == -1 # remove default values
masked = np.ma.masked_array(feature_distribution, m1)
for x, value in enumerate(masked):
if (x % num_weeks == 0 and dropout_vector[x] == 0) or (x % num_weeks != 0 and dropout_vector[x - 1] == 0) : #remove values where the student was always dropped out or has already dropped out the prior week
masked.mask[x] = True
graph_distribution(masked.compressed(), feature_set[feature_index -1], feature_index - start_feature + 1, num_features)
print "Ran Feature %s in" % (feature_set[feature_index -1]), time.time() - start_time, "seconds"
pl.subplots_adjust(hspace=.5)
pl.subplots_adjust(wspace=.5)
# pl.show()
utils.save_fig("/home/colin/evo/papers/thesis/figures/feature_distributions/%s_%s_%s" % (features_base, start_feature, end_feature))
def train(args, model, train_loader, optimizer, epoch_index):
model.train()
correct = 0
epoch_train_loss = 0.0
## use a weight matrix to store the weight of the network which will be used for visualization
weight_matrix = np.zeros(
(args.image_fashion_mnist_width, args.image_fashion_mnist_height))
for batch_idx, (data, target) in enumerate(train_loader):
## preparing the data fed into the neural network
data, target = Variable(data), Variable(target)
optimizer.zero_grad()
## obtain the output of the network
if args.dataset_name == "cifar10":
output = model(data)
elif args.dataset_name == "fashion_mnist":
# if viusalize the weights of neural network
if args.visual_flag:
output, weight_ret = model(data)
weight_matrix = weight_ret.detach().numpy()
# not viusalize the weights of neural network
else:
output = model(data)
# calculate the predication
train_pred = torch.argmax(F.softmax(output, dim=1), dim=1).view(-1, )
# count the correct prediction
correct += train_pred.eq(target.data).sum()
# The cross entropy loss is calculated, softmax function is embedded in F.cross_entropy() function
loss = F.cross_entropy(output, target)
epoch_train_loss += loss.item()
# loss is used for back-propagation (BP) in MLP
loss.backward()
optimizer.step()
epoch_train_accuracy = 100. * correct / len(train_loader.dataset)
epoch_loss_mean = epoch_train_loss / len(train_loader)
if epoch_index % args.log_interval == 0:
print('Train Epoch: {}\tLoss: {:.6f} Accuracy: {:.2f}%'.format(
epoch_index, epoch_loss_mean, epoch_train_accuracy))
# visualize the weights of neural network for Fashion MNIST dataset
if args.dataset_name == "fashion_mnist" and args.visual_flag and epoch_index % args.save_weight_interval == 0:
os.makedirs(args.output_folder, exist_ok=True)
save_fig(
args, weight_matrix,
os.path.join(args.output_folder,
"network_weights_" + str(epoch_index) + ".pdf"))
return epoch_loss_mean, epoch_train_accuracy
def make_errorbar(ylabel, operations, file_path, stats, types, xlabel):
fig, axes = plt.subplots(1, 2, figsize=(10, 5))
params = [{'color': 'red'}, {'color': 'blue'}]
for i in range(len(axes)):
axes[i] = utils.custom_errorbar(stats['keys'], stats[types[0] + '_' + ylabel + '_' + operations[i]],
stats[types[1] + '_' + ylabel + '_' + operations[i]], axes[i], title=operations[i],
xlabel=xlabel, ylabel=ylabel, kwargs=params[i])
utils.save_fig(fig, file_path + ylabel + '_deviation.png')
def evaluate_config(X_test,
X_train,
Y_test,
Y_train,
acc_list,
e_loss,
p_loss,
model_orig,
inputs,
outputs,
model,
z_idx,
title,
fig_dir=None,
use_LIME=True):
fig, (ax_1, ax_2) = plt.subplots(1, 2, figsize=(8, 4))
ax = ax_1
color = 'tab:orange'
ax.plot(np.arange(len(e_loss)),
e_loss,
label="Explanation Loss",
color=color)
ax.set_ylabel("loss")
ax2 = ax.twinx() # instantiate a second axes that shares the same x-axis
color = 'tab:green'
ax2.plot(np.arange(len(acc_list)),
np.array(acc_list)[:, 1],
label="Accuracy",
color=color)
ax.set_xlabel("epochs")
ax2.set_ylabel("accuracy")
# second ax
ax = ax_2
color = 'tab:orange'
ax.plot(np.arange(len(e_loss)), e_loss, color=color)
ax.set_ylabel("explanation loss")
ax2 = ax.twinx() # instantiate a second axes that shares the same x-axis
color = 'tab:blue'
ax2.plot(np.arange(len(p_loss)),
p_loss,
label="Categorical Cross-Entropy",
color=color)
ax2.set_ylabel("performance loss")
ax.set_xlabel("epochs")
fig.legend(loc='upper left')
# ax2.legend()
plt.tight_layout()
if fig_dir is not None:
save_fig(fig, "loss_cf", fig_dir)
df, df_test = evaluate_config_2(X_test, X_train, Y_test, Y_train, fig_dir,
inputs, model, model_orig, outputs, title,
use_LIME, z_idx)
return df, df_test
def render(env):
# to render an environment, you can use the mode 'human'
#img = env.render(mode='human')
# to get back the image in the form of a NumPy array, use mode='rgb_array'
img = env.render(mode='rgb_array')
plt.figure(figsize=(6, 8))
plt.imshow(img)
plt.axis('off')
utils.save_fig(config.ENV_SHORT_NAME + '_step1')
plt.show()
def make_plot(ylabel, operations, file_path, stats, types, xlabel):
fig, axes = plt.subplots(1, 3, figsize=(15, 5))
params1 = {'color': 'red', 'linestyle': '-', 'label': operations[0]}
params2 = {'color': 'blue', 'linestyle': '--', 'label': operations[1]}
for ax, tp in zip(axes, types):
ax = utils.custom_plots(stats['keys'], stats[tp + '_' + ylabel + '_' + operations[0]],
stats[tp + '_' + ylabel + '_' + operations[1]], ax,
title=tp.capitalize(), xlabel=xlabel, ylabel=ylabel, kwargs1=params1, kwargs2=params2)
utils.save_fig(fig, file_path + ylabel + '_statistics.png')
def make_record_alg_cmp_bar(path, operations, ylabel, stats, extra_labels, handshake=False):
xtickslabels = []
sec_lvl = []
scale_type = ['linear', 'log']
for key in stats[list(stats.keys())[0]]['keys']:
val = key.split('_')
if val[1] not in sec_lvl:
sec_lvl.append(val[1])
for key in stats:
tmp = ''
for id in extra_labels[key]:
tmp += id
if tmp == '':
xtickslabels.append(key)
else:
xtickslabels.append(key + '\n(' + tmp + ')')
for op in operations:
for lvl in sec_lvl:
y = {}
for key in stats:
for key in stats[key]['keys']:
elem = key.split('_')
if elem[0] not in y:
y[elem[0]] = []
for alg in y:
for key in stats:
try:
idx = stats[key]['keys'].index(alg + '_' + lvl)
y[alg].append(stats[key]['mean_' + ylabel + '_' + op][idx])
except (ValueError, KeyError):
y[alg].append(0)
# print('')
# for a in y:
# print(f'{a}: {y[a]} : {len(y[a])}')
for scale in scale_type:
fig, ax = plt.subplots(1, 1, figsize=(30, 10))
ax = utils.stacked_custom_bar(y, ax, handshake=handshake, title=op + ' (mean)', scale=scale,
xlabel='algorithms', xtickslabels=xtickslabels, ylabel=ylabel)
utils.save_fig(fig, 'statistics/' + path + '/serv_all_' + op +
'_' + settings.sec_str[int(lvl)] + '_' + ylabel + '_' + scale + '.png')
def visualize_k_fold_precision_recall_plot(X,y_gold,classifier,K):
"""
Visualizes K Average Precision-Recall curves created from K-fold cross validation and the mean Precision-Recall curve.
Keyword arguments:
X -- The feature vectors
y_gold_standard -- Expected labels.
classifier -- The classifier to be used
K -- Number of folds to perform
"""
cross_validation = StratifiedKFold(y_gold, n_folds=K)
mean_precision = 0.0
mean_recall= 0.0
avg_mean_precision_recall=0.0
for i, (train, test) in enumerate(cross_validation):
#classify
classifier.fit(X[train], y_gold[train])
y_predicted=classifier.predict(X[test])
#compute Precision-Recall
precision, recall, thresholds = precision_recall_curve(y_gold[test].ravel(),y_predicted.ravel())
average_precision = average_precision_score(y_gold[test], y_predicted)
plt.plot(recall, precision,label='Precision-recall fold %d (area = %0.2f)' % (i+1, average_precision) )
#save means
mean_precision += precision
mean_recall += recall
avg_mean_precision_recall+=average_precision
#compute final mean
mean_precision /= len(cross_validation)
mean_recall /= len(cross_validation)
avg_mean_precision_recall /= len(cross_validation)
plt.plot(mean_recall,mean_precision, 'k--',label='Mean Precision-Recall (area = %0.2f)' % avg_mean_precision_recall, linewidth=2)
plt.plot([0,1], [0.5, 0.5], '--', color=(0.6, 0.6, 0.6), label='Random Classifier')
plt.xlim([0.0, 1.0])
plt.ylim([0.0, 1.05])
plt.xlabel('Recall')
plt.ylabel('Precision')
plt.title('Precision-Recall Curve')
plt.legend(loc="lower left")
# plt.show()
#save fig
output_dir='img'
save_fig(output_dir,'{}/pr_curve.png'.format(output_dir))
plt.close()
def plot_predictive_comparison(env, baseline_samples, target_samples, stddev_mult=3., target_metrics=None,
title_name=None):
# single var regression only
baseline_samples = baseline_samples.squeeze()
target_samples = target_samples.squeeze()
train_x, train_y = env.get_train_x(), env.get_train_y()
test_x, test_y = env.get_test_x(), env.get_test_y()
pad_width = test_x.shape[0] - train_x.shape[0]
train_x_padded = np.pad(train_x[:, 0], (0, pad_width), 'constant', constant_values=np.nan)
train_y_padded = np.pad(train_y[:, 0], (0, pad_width), 'constant', constant_values=np.nan)
df = pd.DataFrame.from_dict({
'time': test_x[:, 0],
'true_y': test_y[:, 0],
'train_x': train_x_padded,
'train_y': train_y_padded,
'mean': target_samples.mean(axis=0),
'std': stddev_mult * target_samples.std(axis=0),
'base_mean': baseline_samples.mean(axis=0),
'base_std': stddev_mult * baseline_samples.std(axis=0),
}).reset_index()
g = sns.FacetGrid(df, size=9, aspect=1.8)
g.map(plt.errorbar, 'time', 'base_mean', 'base_std', color=(0.7, 0.1, 0.1, 0.09))
g.map(plt.errorbar, 'time', 'mean', 'std', color=(0.1, 0.1, 0.7, 0.09))
g.map(plt.plot, 'time', 'mean', color='b', lw=1)
g.map(plt.plot, 'time', 'true_y', color='r', lw=1)
g.map(plt.scatter, 'train_x', 'train_y', color='g', s=20)
ax = g.ax
ax.set_title('Posterior Predictive Distribution' + (': ' + title_name) if title_name is not None else '')
ax.set(xlabel='X', ylabel='Y')
ax.set_xlim(env.view_xrange[0], env.view_xrange[1])
ax.set_ylim(env.view_yrange[0], env.view_yrange[1])
legend = ['Prediction mean', 'True f(x)', 'Training data', 'True StdDev', 'Predicted StdDev']
plt.legend(legend)
if target_metrics is not None:
offset = 0
for tm, tv in target_metrics.items():
ax.annotate('{}: {:.02f}'.format(tm, tv), xy=(0.08, 0.92 - offset), xytext=(0.08, 0.92 - offset),
xycoords='figure fraction', textcoords='figure fraction')
offset += 0.04
name = utils.DATA_DIR.replace('/', '-')
plt.tight_layout(pad=0.6)
utils.save_fig('predictive-distribution-' + name)
def plot_predictive_baseline(env, samples, stddev_mult=3., title_name=None):
# single var regression only
samples = samples.squeeze()
train_x, train_y = env.get_train_x(), env.get_train_y()
test_x, test_y = env.get_test_x(), env.get_test_y()
pad_width = test_x.shape[0] - train_x.shape[0]
train_x_padded = np.pad(train_x[:, 0], (0, pad_width),
'constant',
constant_values=np.nan)
train_y_padded = np.pad(train_y[:, 0], (0, pad_width),
'constant',
constant_values=np.nan)
data = samples
df = pd.DataFrame.from_dict({
'time': test_x[:, 0],
'true_y': test_y[:, 0],
'train_x': train_x_padded,
'train_y': train_y_padded,
'mean': data.mean(axis=0),
'std': stddev_mult * data.std(axis=0),
# 'stdn': 2. * (data.std(axis=0) + .5 ** .5),
}).reset_index()
g = sns.FacetGrid(df, size=9, aspect=1.8)
g.map(plt.errorbar, 'time', 'mean', 'std', color=(0.7, 0.1, 0.1, 0.09))
g.map(plt.plot, 'time', 'mean', color='b', lw=1)
g.map(plt.plot, 'time', 'true_y', color='r', lw=1)
g.map(plt.scatter, 'train_x', 'train_y', color='g', s=20)
ax = g.ax
ax.set_title('Posterior Predictive Distribution' +
(': ' + title_name) if title_name is not None else '')
ax.set(xlabel='X', ylabel='Y')
ax.set_xlim(env.view_xrange[0], env.view_xrange[1])
ax.set_ylim(env.view_yrange[0], env.view_yrange[1])
legend = ['Prediction mean', 'True f(x)', 'Training data', 'StdDev']
plt.legend(legend)
# ax.annotate("MSE: {:.03f}".format(0), xy=(0.1, 0.9), xytext=(0.1, 0.9), xycoords='figure fraction',
# textcoords='figure fraction')
name = utils.DATA_DIR.replace('/', '-')
plt.tight_layout(pad=0.6)
utils.save_fig('predictive-distribution-' + name)
def visualize_k_fold_roc_plot(X,y_gold,classifier,K):
"""
Visualizes K ROC curves created from K-fold cross validation and the mean ROC curve.
Keyword arguments:
X -- The feature vectors
y_gold_standard -- Expected labels.
classifier -- The classifier to be used
K -- Number of folds to perform
"""
cross_validation = StratifiedKFold(y_gold, n_folds=K)
mean_true_positive_rate = 0.0
mean_false_positive_rate = 0.0
for i, (train, test) in enumerate(cross_validation):
#classify
classifier.fit(X[train], y_gold[train])
y_predicted=classifier.predict(X[test])
#compute ROC
false_positive_rate, true_positive_rate, thresholds = roc_curve(y_gold[test], y_predicted)
roc_auc = auc(false_positive_rate, true_positive_rate)
plt.plot(false_positive_rate, true_positive_rate, linewidth=1, label='ROC fold %d (area = %0.2f)' % (i+1, roc_auc))
#save means
mean_true_positive_rate += true_positive_rate
mean_false_positive_rate += false_positive_rate
#compute final mean
mean_true_positive_rate /= len(cross_validation)
mean_false_positive_rate /= len(cross_validation)
mean_auc = auc(mean_false_positive_rate, mean_true_positive_rate)
plt.plot(mean_false_positive_rate, mean_true_positive_rate, 'k--',label='Mean ROC (area = %0.2f)' % mean_auc, linewidth=2)
plt.plot([0, 1], [0, 1], '--', color=(0.6, 0.6, 0.6), label='Random Classifier')
plt.xlabel('False Positive Rate')
plt.ylabel('True Positive Rate')
plt.title('Receiver Operating Characteristic (ROC) Curve')
plt.legend(loc="lower right")
# plt.show()
#save fig
output_dir='img'
save_fig(output_dir,'{}/roc.png'.format(output_dir))
plt.close()
def plot_box(xs,
ys,
data,
xaxis_label=None,
yaxis_label=None,
x_sci=False,
y_sci=True,
name=None):
fig, ax = plt.subplots()
ax = sns.boxplot(x=xs, y=ys, data=data, linewidth=1, fliersize=6)
utils.set_sci_axis(ax, x_sci, y_sci)
utils.set_axis_labels(ax, xaxis_label, yaxis_label)
utils.finalize(ax)
utils.save_fig(name)
def plot_bar(x, y, hue=None, hue_count=1,
line_values=None, line_label=None, legend=True,
xaxis_label=None, yaxis_label=None,
xticks=None, y_lim=None,
x_sci=True, y_sci=True,
fig_size=None,
y_err=None,
name=None):
fig, ax = plt.subplots()
if fig_size and isinstance(fig_size, list) and len(fig_size) > 0:
if len(fig_size) == 1:
fig.set_figwidth(fig_size[0])
else:
fig.set_figwidth(fig_size[0])
fig.set_figheight(fig_size[1])
bar_width = 0.2
new_x = [x_ + bar_width for x_ in x]
ticks_x = [x_ + 0.5*bar_width for x_ in new_x]
if y_err:
ax.errorbar(ticks_x, y, yerr=y_err, fmt='o', ecolor='r', capthick=1, elinewidth=1)
plt.bar(new_x, y, width=bar_width)
if line_values and utils.is_list(line_values):
x_set = set(x)
if len(line_values) == len(x_set):
if line_label:
ax.plot(ax.get_xticks(), line_values, label=line_label)
hue_count += 1
else:
ax.plot(ax.get_xticks(), line_values)
if xticks and isinstance(xticks, list):
plt.xticks(ticks_x, xticks)
if y_lim and isinstance(y_lim, list) and len(y_lim) > 0:
if len(y_lim) == 1:
plt.ylim(ymin=y_lim[0])
else:
plt.ylim(ymin=y_lim[0])
plt.ylim(ymax=y_lim[1])
if legend:
utils.set_legend(ncol=hue_count)
utils.set_sci_axis(ax, x_sci, y_sci)
utils.set_axis_labels(ax, xaxis_label, yaxis_label)
utils.finalize(ax, x_grid=False)
utils.save_fig(name)
def make_scatter(ylabel, operations, file_path, data, xlabel):
fig, axes = plt.subplots(1, 2, figsize=(10, 5))
x = {}
y = {}
xtickslabels = list(data.keys())
kwargs = [{'color': 'red'}, {'color': 'blue'}]
for op in operations:
x[op] = []
y[op] = []
for key, i in zip(data, range(len(xtickslabels))):
x[op] += [i for j in range(len(data[key][ylabel + '_' + op]))]
y[op] += data[key][ylabel + '_' + op]
for i in range(len(axes)):
axes[i] = utils.custom_scatter(x[operations[i]], y[operations[i]], axes[i], title=operations[i],
xtickslabels=xtickslabels, xlabel=xlabel, ylabel=ylabel, kwargs=kwargs[i])
utils.save_fig(fig, file_path + ylabel + '_distribution.png')
def feature_cdf(X, y, selected_feature):
"""
Plot the empirical/stand cumulative density function of the given feature
Keyword arguments:
X -- The feature vectors
y -- The target vector
selected_feature -- The desired feature to obtain the histogram
"""
#Standard Normal Cumulative Density Function
N = len(X)
Normal = np.random.normal(size=N)
histogram, bin_edges = np.histogram(Normal, bins=N, normed=True)
dx = bin_edges[1] - bin_edges[0]
G = np.cumsum(histogram) * dx
#Empirical Cumulative Density Functions
feature_index = int(selected_feature[1:]) - 1
X_k = np.sort(X[:, feature_index]) #feature vector sorted
ECDF_k = np.array(range(N)) / float(
N) #Empirical Cumulative Function F, steps of 1/N
#Kolmogorov-Smirnov Test
result = kolmogorov_smirnov_two_sample_test(G, ECDF_k)
ks_statistic = result[0]
p_value = result[1]
plt.plot(bin_edges[1:],
G,
label="Standard Normal Cumulative Density Funcion")
plt.plot(X_k, ECDF_k, label="Empirical Cumulative Density Function")
plt.suptitle("Empirirical vs Standard Normal Cumulative Distribution of " +
selected_feature + " Feature\nKolmogorov-Smirnov Statistic=" +
str(ks_statistic))
plt.xlabel(selected_feature)
plt.legend(loc='center right')
# plt.show()
#save fig
output_dir = "img"
save_fig(output_dir, '{}/{}_cdf.png'.format(output_dir, selected_feature))
def visualize_hist_pairplot(X, y, selected_feature1, selected_feature2,
features, diag_kind):
"""
Visualize the pairwise relationships (Histograms and Density Funcions) between classes and respective attributes
Keyword arguments:
X -- The feature vectors
y -- The target vector
selected_feature1 - First feature
selected_feature1 - Second feature
diag_kind -- Type of plot in the diagonal (Histogram or Density Function)
"""
#create data
joint_data = np.column_stack((X, y))
column_names = features
#create dataframe
df = pd.DataFrame(data=joint_data, columns=column_names)
#plot
palette = sea.hls_palette()
splot = sea.pairplot(df,
hue="Y",
palette={
0: palette[2],
1: palette[0]
},
vars=[selected_feature1, selected_feature2],
diag_kind=diag_kind)
splot.fig.suptitle('Pairwise relationship: ' + selected_feature1 + " vs " +
selected_feature2)
splot.set(xticklabels=[])
# plt.subplots_adjust(right=0.94, top=0.94)
#save fig
output_dir = "img"
save_fig(
output_dir,
'{}/{}_{}_hist_pairplot.png'.format(output_dir, selected_feature1,
selected_feature2))
def plot_two_bars(ys, labels,
legend=True,
xaxis_label=None,
yaxis_label=None,
xticks=None, y_lim=None,
x_sci=True, y_sci=True,
fig_size=None,
name=None):
fig, ax = plt.subplots()
if fig_size and isinstance(fig_size, list) and len(fig_size) > 0:
if len(fig_size) == 1:
fig.set_figwidth(fig_size[0])
else:
fig.set_figwidth(fig_size[0])
fig.set_figheight(fig_size[1])
bar_width = 0.2
x = range(len(ys))
new_x1 = [x_ for x_ in x]
new_x2 = [x_ + bar_width for x_ in x]
rects1 = ax.bar(new_x1, ys[0], width=bar_width, color='b')
rects2 = ax.bar(new_x2, ys[1], width=bar_width)
if xticks and isinstance(xticks, list):
plt.xticks([x_ + bar_width for x_ in new_x1], xticks)
if y_lim and isinstance(y_lim, list) and len(y_lim) > 0:
if len(y_lim) == 1:
plt.ylim(ymin=y_lim[0])
else:
plt.ylim(ymin=y_lim[0])
plt.ylim(ymax=y_lim[1])
if legend:
ax.legend((rects1[0], rects2[0]), (labels[0], labels[1]),
fontsize=28, frameon=False,
bbox_to_anchor=(0, 0.95, 1.2, .10), handlelength=0.5, handletextpad=0.2,
loc=3, ncol=2, mode="expand",
borderaxespad=0.)
utils.set_sci_axis(ax, x_sci, y_sci)
utils.set_axis_labels(ax, xaxis_label, yaxis_label)
utils.finalize(ax, x_grid=False)
utils.save_fig(name)
def visualize_pca2D(X, y):
"""
Visualize the first two principal components
Keyword arguments:
X -- The feature vectors
y -- The target vector
"""
pca = PCA(n_components=2)
principal_components = pca.fit_transform(X)
palette = sea.color_palette()
plt.scatter(principal_components[y == 0, 0],
principal_components[y == 0, 1],
marker='s',
color='green',
label="Paid",
alpha=0.5,
edgecolor='#262626',
facecolor=palette[1],
linewidth=0.15)
plt.scatter(principal_components[y == 1, 0],
principal_components[y == 1, 1],
marker='^',
color='red',
label="Default",
alpha=0.5,
edgecolor='#262626'
'',
facecolor=palette[2],
linewidth=0.15)
leg = plt.legend(loc='upper right', fancybox=True)
leg.get_frame().set_alpha(0.5)
plt.title("Two-Dimensional Principal Component Analysis")
plt.tight_layout
#save fig
output_dir = 'img'
save_fig(output_dir, '{}/pca2D.png'.format(output_dir))
def visualize_lda2D(X, y):
"""
Visualize the separation between classes using the two most discriminant features
Keyword arguments:
X -- The feature vectors
y -- The target vector
"""
labels = ['Paid', 'Default']
lda = LDA(n_components=2, solver='eigen')
# lda = LDA(n_components = 2)
discriminative_attributes = lda.fit(X, y).transform(X)
palette = sea.color_palette()
# plt.plot(discriminative_attributes[:,0][y==0],'sg',label="Paid", alpha=0.5)
# plt.plot(discriminative_attributes[:,0][y==1],'^r',label="Default", alpha=0.5)
plt.scatter(discriminative_attributes[:, 0][y == 0],
discriminative_attributes[:, 1][y == 0],
marker='s',
color='green',
label="Paid",
alpha=0.5)
plt.scatter(discriminative_attributes[:, 0][y == 1],
discriminative_attributes[:, 1][y == 1],
marker='^',
color='red',
label="Default",
alpha=0.5)
plt.xlabel('First Linear Discriminant')
plt.ylabel('Second Linear Discriminant')
leg = plt.legend(loc='upper right', fancybox=True)
leg.get_frame().set_alpha(0.5)
plt.title("Linear Discriminant Analysis")
plt.tight_layout
#save fig
output_dir = 'img'
save_fig(output_dir, '{}/lda.png'.format(output_dir))
def feature_cdf(X,y,selected_feature):
"""
Plot the empirical/stand cumulative density function of the given feature
Keyword arguments:
X -- The feature vectors
y -- The target vector
selected_feature -- The desired feature to obtain the histogram
"""
#Standard Normal Cumulative Density Function
N = len(X)
Normal = np.random.normal(size = N)
histogram,bin_edges = np.histogram(Normal, bins = N, normed = True )
dx = bin_edges[1] - bin_edges[0]
G = np.cumsum(histogram)*dx
#Empirical Cumulative Density Functions
feature_index=int(selected_feature[1:])-1
X_k = np.sort(X[:,feature_index]) #feature vector sorted
ECDF_k = np.array(range(N))/float(N) #Empirical Cumulative Function F, steps of 1/N
#Kolmogorov-Smirnov Test
result=kolmogorov_smirnov_two_sample_test(G,ECDF_k)
ks_statistic=result[0]
p_value=result[1]
plt.plot(bin_edges[1:], G, label="Standard Normal Cumulative Density Funcion")
plt.plot(X_k, ECDF_k,label="Empirical Cumulative Density Function")
plt.suptitle("Empirirical vs Standard Normal Cumulative Distribution of "+selected_feature+" Feature\nKolmogorov-Smirnov Statistic="+str(ks_statistic))
plt.xlabel(selected_feature)
plt.legend(loc='center right')
# plt.show()
#save fig
output_dir = "img"
save_fig(output_dir,'{}/{}_cdf.png'.format(output_dir,selected_feature))
def visualize_pca2D(X,y):
"""
Visualize the first two principal components
Keyword arguments:
X -- The feature vectors
y -- The target vector
"""
pca = PCA(n_components = 2)
principal_components = pca.fit_transform(X)
palette = sea.color_palette()
plt.scatter(principal_components[y==0, 0], principal_components[y==0, 1], marker='s',color='green',label="Paid", alpha=0.5,edgecolor='#262626', facecolor=palette[1], linewidth=0.15)
plt.scatter(principal_components[y==1, 0], principal_components[y==1, 1], marker='^',color='red',label="Default", alpha=0.5,edgecolor='#262626''', facecolor=palette[2], linewidth=0.15)
leg = plt.legend(loc='upper right', fancybox=True)
leg.get_frame().set_alpha(0.5)
plt.title("Two-Dimensional Principal Component Analysis")
plt.tight_layout
#save fig
output_dir='img'
save_fig(output_dir,'{}/pca2D.png'.format(output_dir))
def adaboost(X_train, X_val, y_train, y_val, doplot=False):
from sklearn.ensemble import AdaBoostClassifier
from sklearn.tree import DecisionTreeClassifier
from sklearn.metrics import accuracy_score
ada_clf = AdaBoostClassifier(
base_estimator=DecisionTreeClassifier(max_depth=1), # weak classifier
n_estimators=200,
algorithm='SAMME.R',
learning_rate=0.5)
ada_clf.fit(X_train, y_train)
y_pred = ada_clf.predict(X_val)
print("Adaboost classifier, accuracy score = %f\n" %
accuracy_score(y_val, y_pred))
if doplot:
from utils import plot_decision_boundary, save_fig
plt.figure(figsize=(11, 4))
plot_decision_boundary(ada_clf, X, y)
plt.title("Adaboost classifcation with Decision Tree base estimator",
fontsize=12)
save_fig("AdaBoost_with_DT", CHAPTER_ID)
plt.show()
def generate_histograms(start_feature, end_feature, features_base):
num_weeks = 15
num_features = end_feature - start_feature + 1
in_file = "data/%s.csv" % features_base
feature_set = validate_csv(in_file)
start_time = time.time()
data = np.genfromtxt(in_file, delimiter=',', skip_header=1)
print "loaded data in", time.time() - start_time, "seconds"
pl.clf()
dropout_vector = data[:, 1]
for feature_index in range(start_feature, end_feature + 1):
feature_distribution = data[:, feature_index]
start_time = time.time()
m1 = feature_distribution == -1 # remove default values
masked = np.ma.masked_array(feature_distribution, m1)
for x, value in enumerate(masked):
if (x % num_weeks == 0 and dropout_vector[x] == 0) or (
x % num_weeks != 0 and dropout_vector[x - 1] == 0
): #remove values where the student was always dropped out or has already dropped out the prior week
masked.mask[x] = True
graph_distribution(masked.compressed(), feature_set[feature_index - 1],
feature_index - start_feature + 1, num_features)
print "Ran Feature %s in" % (feature_set[feature_index - 1]
), time.time() - start_time, "seconds"
pl.subplots_adjust(hspace=.5)
pl.subplots_adjust(wspace=.5)
# pl.show()
utils.save_fig(
"/home/colin/evo/papers/thesis/figures/feature_distributions/%s_%s_%s"
% (features_base, start_feature, end_feature))
def save_figure(self, save_dir_path):
if not check_is_dir(save_dir_path):
raise IsADirectoryError(r'please give a correct dir_path')
save_dir_path = Path(save_dir_path)
if not self._flag_univariate_analysis:
raise PermissionError("save_figure will be excute when univariate_analysis finished")
save_fig(self._plot_distribute, save_dir_path, type_str='distribute')
save_fig(self._plot_distribute_target, save_dir_path, type_str='distribute_taget')
save_fig(self._plot_ar, save_dir_path, type_str='ar')
def enet_plot(l1_ratio):
"""Function plotting enet_path for some tuning parameter."""
_, theta_enet, _ = linear_model.enet_path(A,
b,
alphas=alphas,
fit_intercept=False,
l1_ratio=l1_ratio,
return_models=False)
fig1 = plt.figure(figsize=(12, 8))
ax1 = fig1.add_subplot(111)
ax1.plot(alphas, np.transpose(theta_enet), linewidth=3)
ax1.set_xscale('log')
ax1.set_xlabel(r"$\lambda$")
ax1.set_ylabel("Coefficient value")
ax1.set_ylim([-1, 5])
plt.savefig(save_fig(path, "enet_coeffs", "pdf"))
plt.show()
return theta_enet
def plot_curves(ytrue, yscores, name):
precisions, recalls, thresholds = precision_recall_curve(ytrue, yscores)
ap = average_precision_score(ytrue, yscores)
plt.figure()
plot_precision_recall_vs_threshold(precisions, recalls, thresholds)
save_fig("{}-PR-vs-thresh.pdf".format(name))
plt.figure()
plot_precision_vs_recall(precisions, recalls, ap)
save_fig("{}-PR.pdf".format(name))
fpr, tpr, thresholds = roc_curve(ytrue, yscores)
auc = roc_auc_score(ytrue, yscores)
plt.figure()
plot_roc_curve(fpr, tpr, auc)
save_fig("{}-ROC.pdf".format(name))
df.hist()
plt.show()
# scatter plot of response vs each feature
nrows = 3
ncols = 4
fig, ax = plt.subplots(nrows=nrows, ncols=ncols, sharey=True, figsize=[15, 10])
plt.tight_layout()
plt.clf()
for i in range(0, 12):
plt.subplot(nrows, ncols, i + 1)
plt.scatter(X[:, i], y)
plt.xlabel(boston.feature_names[i])
plt.ylabel("house price")
plt.grid()
save_fig("boston-housing-scatter")
plt.show()
# Rescale input data
X_train, X_test, y_train, y_test = train_test_split(X,
y,
test_size=0.33,
random_state=42)
scaler = sklearn.preprocessing.StandardScaler()
scaler = scaler.fit(X_train)
Xscaled = scaler.transform(X_train)
# equivalent to Xscaled = scaler.fit_transform(X_train)
# Fit model
def train(self, num_epoch):
for epoch in range(num_epoch):
if (self.resample):
train_dl_iter = iter(self.train_dl)
for i, data in enumerate(tqdm(self.train_dl)):
# (1) : minimizes mean((D(x) - mean(D(G(z))) - 1)**2) + mean((D(G(z)) - mean(D(x)) + 1)**2)
self.netD.zero_grad()
real_images = data[0].to(self.device)
bs = real_images.size(0)
# real labels (bs)
real_label = torch.full((bs, ),
self.real_label,
device=self.device)
# fake labels (bs)
fake_label = torch.full((bs, ),
self.fake_label,
device=self.device)
# noise (bs, nz, 1, 1), fake images (bs, cn, 64, 64)
noise = generate_noise(bs, self.nz, self.device)
fake_images = self.netG(noise)
# calculate the discriminator results for both real & fake
c_xr = self.netD(real_images) # (bs, 1, 1, 1)
c_xr = c_xr.view(-1) # (bs)
c_xf = self.netD(fake_images.detach()) # (bs, 1, 1, 1)
c_xf = c_xf.view(-1) # (bs)
# calculate the Discriminator loss
errD = (torch.mean(
(c_xr - torch.mean(c_xf) - real_label)**2) + torch.mean(
(c_xf - torch.mean(c_xr) + real_label)**2)) / 2.0
errD.backward()
# update D using the gradients calculated previously
self.optimizerD.step()
# (2) : minimizes mean((D(G(z)) - mean(D(x)) - 1)**2) + mean((D(x) - mean(D(G(z))) + 1)**2)
self.netG.zero_grad()
if (self.resample):
real_images = next(train_dl_iter)[0].to(self.device)
noise = generate_noise(bs, self.nz, self.device)
fake_images = self.netG(noise)
# we updated the discriminator once, therefore recalculate c_xr, c_xf
c_xr = self.netD(real_images) # (bs, 1, 1, 1)
c_xr = c_xr.view(-1) # (bs)
c_xf = self.netD(fake_images) # (bs, 1, 1, 1)
c_xf = c_xf.view(-1) # (bs)
# calculate the Generator loss
errG = (torch.mean(
(c_xf - torch.mean(c_xr) - real_label)**2) + torch.mean(
(c_xr - torch.mean(c_xf) + real_label)**2)) / 2.0
errG.backward()
# update G using the gradients calculated previously
self.optimizerG.step()
self.errD_records.append(float(errD))
self.errG_records.append(float(errG))
if (i % self.loss_interval == 0):
print('[%d/%d] [%d/%d] errD : %.4f, errG : %.4f' %
(epoch + 1, num_epoch, i + 1,
self.train_iteration_per_epoch, errD, errG))
if (i % self.image_interval == 0):
if (self.special == None):
sample_images_list = get_sample_images_list(
'Unsupervised', (self.fixed_noise, self.netG))
plot_fig = plot_multiple_images(
sample_images_list, 4, 4)
cur_file_name = os.path.join(
self.save_img_dir,
str(self.save_cnt) + ' : ' + str(epoch) + '-' +
str(i) + '.jpg')
self.save_cnt += 1
save_fig(cur_file_name, plot_fig)
plot_fig.clf()
elif (self.special == 'Wave'):
sample_audios_list = get_sample_images_list(
'Unsupervised_Audio',
(self.fixed_noise, self.netG))
plot_fig = plot_multiple_spectrograms(
sample_audios_list, 4, 4, freq=16000)
cur_file_name = os.path.join(
self.save_img_dir,
str(self.save_cnt) + ' : ' + str(epoch) + '-' +
str(i) + '.jpg')
self.save_cnt += 1
save_fig(cur_file_name, plot_fig)
plot_fig.clf()
if (self.snapshot_interval is not None):
if (i % self.snapshot_interval == 0):
save(
os.path.join(
self.save_snapshot_dir, 'Epoch' + str(epoch) +
'_' + str(i) + '.state'), self.netD, self.netG,
self.optimizerD, self.optimizerG)
def evaluate_config_2(X_test, X_train, Y_test, Y_train, fig_dir, inputs, model,
model_orig, outputs, title, use_LIME, z_idx):
# In[66]:
loss_tr, acc_tr = model.evaluate(X_train, Y_train)
loss_ts, acc_ts = model.evaluate(X_test, Y_test)
loss_tr_o, acc_tr_o = model_orig.evaluate(X_train, Y_train)
loss_ts_o, acc_ts_o = model_orig.evaluate(X_test, Y_test)
# In[81]:
round_err = 4
loss_diff_tr = np.round(np.abs(loss_tr - loss_tr_o), round_err)
loss_diff_ts = np.round(np.abs(loss_ts - loss_ts_o), round_err)
print("Loss Diff: train - {} ---- test - {}".format(
loss_diff_tr, loss_diff_ts))
acc_diff_tr = np.round(np.abs(acc_tr - acc_tr_o), round_err)
acc_diff_ts = np.round(np.abs(acc_ts - acc_ts_o), round_err)
print("Acc Diff: train - {:.2f}% ---- test - {:.2f}%".format(
acc_diff_tr * 100, acc_diff_ts * 100))
explanation_loss_tr = compute_explanation_loss(inputs, outputs, model,
z_idx)
# if explanation_loss_tr != e_loss[-1]:
# print("Explanation loss not computed correctly! compute:{} e_loss:{}".format(
# float(explanation_loss_tr), float(e_loss[-1])))
print("Explanation loss - {:.4f}".format(explanation_loss_tr))
# 0 because suddenly non of the features are important!
# In[68]:
# In[74]:
num_p, percent = analyze_mismatch(model_orig, model, inputs)
print("Prediction Mismatch (Train):", num_p, str(round(percent, 3)) + "%")
# Test Set Mismatch
inputs_test = tf.convert_to_tensor(X_test, dtype=tf.float32)
outputs_test = tf.convert_to_tensor(Y_test, dtype=tf.float32)
num_p, percent = analyze_mismatch(model_orig, model, inputs_test)
print("Prediction Mismatch (Test):", num_p, str(round(percent, 3)) + "%")
# In[76]:
from evaluate import plot_ranking_histograms
from functools import partial
# In[78]:
models = [model_orig, model]
att_methods = attribution_methods
if not use_LIME:
att_methods = att_methods[:-1]
# TODO the attribution methods are evaluate 2x -> ones in plot_ranking & ones in analyze DF! there is no reason!
plot_ranking_histograms_ = partial(plot_ranking_histograms,
models=models,
z_idx=z_idx,
num_f=X_train.shape[1] - 1,
attribution_methods=att_methods)
fig_train = plot_ranking_histograms_(inputs=inputs,
ys=outputs,
title="{} Train".format(title))
save_fig(fig_train, fname="ranking_histograms_train", fig_dir=fig_dir)
# In[80]:
# with Test
fig_test = plot_ranking_histograms_(inputs=inputs_test,
ys=outputs_test,
title="{} Test".format(title))
save_fig(fig_test, fname="ranking_histograms_test", fig_dir=fig_dir)
# ### Explain ranking
# In[84]:
print("Computing Summary Table Train")
df = get_summary_table(models=models,
inputs=inputs,
outputs=outputs,
feature=z_idx,
attribution_methods=att_methods)
diff_mean_tr, df_top_diff_tr, shifts_sum_tr, shifts_mean_tr = analyze_summary_table(
df, title=title)
print("Computing Summary Table Test")
df_test = get_summary_table(models=models,
inputs=inputs_test,
outputs=outputs_test,
feature=z_idx,
attribution_methods=att_methods)
diff_mean_ts, df_top_diff_ts, shifts_sum_ts, shifts_mean_ts = analyze_summary_table(
df_test, title)
return df, df_test
ax = pl.gca()
pl.imshow(np.transpose(data), interpolation='nearest',origin='lower', vmin=0, vmax=1, cmap='RdBu')
ax.set_xlabel("The predicted week number", fontsize=fontsize)
ax.set_ylabel("Lag", fontsize=fontsize)
# pl.title('Logistic Regression AUC: %s' % cohort, fontsize=fontsize)
ax.set_xticks(range(n))
ax.set_yticks(range(n))
ax.set_xticklabels(range(2,n+2),fontsize=med_fontsize)
ax.set_yticklabels(range(1,n+1),fontsize=med_fontsize)
cb = pl.colorbar()
for t in cb.ax.get_yticklabels():
t.set_fontsize(med_fontsize)
utils.save_fig("/home/colin/evo/papers/thesis/figures/hmm_logreg/%s_support_%s" % (cohort, max_support))
#plot mean AUC over support:
benchmarks = {
"no_collab": 0.775938784743,
"wiki_only": 0.609065848058,
"forum_and_wiki": 0.648563087051,
"forum_only": 0.76697590925}
pl.clf()
ax = pl.gca()
pl.plot(range(3, 30,2), [means[support] for support in range(3, 30,2)])
# pl.title('HMM logreg: %s' % cohort, fontsize=fontsize)
ax.set_xlabel("Number of support", fontsize=fontsize)
ax.set_ylabel("Mean AUC of all leads and lags", fontsize=fontsize)
for cohort in cohorts:
n = len(feature_vectors[cohort])
ax = pl.gca()
pl.bar(range(n), feature_vectors[cohort], color='0.75')
# pl.title('Randomized logistic Regression: %s' % cohort, fontsize=fontsize)
ax.set_xlabel("Feature number", fontsize=fontsize)
ax.set_ylabel("Average feature weight", fontsize=fontsize)
ax.set_xticks(range(n))
ax.set_xticklabels(features, fontsize=AUC_fontsize, rotation='vertical')
utils.save_fig(
"/home/colin/evo/papers/thesis/figures/logreg/randomized_%s" % cohort)
# pl.show()
# break
pl.clf()
for cohort in cohorts:
in_file = "results/randomized_logistic_reg_features_%s_time_averaged.csv" % cohort
data = np.genfromtxt(in_file, delimiter=",")[1:, :-1]
n = len(data)
for i in range(n):
if np.all(data[:, i] == 0):
n = i
data = data[:n, :n]
for col in range(n):
data[:, col] /= norm(data[:, col])
import matplotlib.pyplot as plt
acc = history_dict['acc']
val_acc = history_dict['val_acc']
loss = history_dict['loss']
val_loss = history_dict['val_loss']
epochs = range(1, len(acc) + 1)
fig, ax = plt.subplots()
plt.plot(epochs, loss, 'bo', label='Training loss')
plt.plot(epochs, val_loss, 'r-', label='Validation loss')
plt.title('Training and validation loss')
plt.xlabel('Epochs')
plt.ylabel('Loss')
plt.legend()
save_fig("imdb-loss.pdf")
plt.show()
fig, ax = plt.subplots()
plt.plot(epochs, acc, 'bo', label='Training acc')
plt.plot(epochs, val_acc, 'r', label='Validation acc')
plt.title('Training and validation accuracy')
plt.xlabel('Epochs')
plt.ylabel('Accuracy')
plt.legend()
save_fig("imdb-acc.pdf")
plt.show()
# Now turn on early stopping
# https://chrisalbon.com/deep_learning/keras/neural_network_early_stopping/
pl.imshow(np.transpose(data), interpolation="nearest", origin="lower", vmin=0, vmax=1)
ax.set_xlabel("Number of hidden support", fontsize=fontsize)
ax.set_ylabel("Lead", fontsize=fontsize)
# ax.set_title('HMM AUC: %s' % cohort, fontsize=fontsize)
ax.set_xticks(range(num_supports))
ax.set_yticks(range(num_leads))
ax.set_xticklabels(range(3, 30, 2), fontsize=med_fontsize)
ax.set_yticklabels(range(1, num_leads), fontsize=med_fontsize)
cb = pl.colorbar()
for t in cb.ax.get_yticklabels():
t.set_fontsize(med_fontsize)
# pl.show()
utils.save_fig("/home/colin/evo/papers/thesis/figures/hmm/%s" % cohort)
for cohort in cohorts:
# plot mean AUC over support:
benchmarks = {
"no_collab": 0.775938784743,
"wiki_only": 0.609065848058,
"forum_and_wiki": 0.648563087051,
"forum_only": 0.76697590925,
}
support_dict = cohort_dict[cohort]
means = {}
for support in range(3, 30, 2):
data = support_dict[support]
n = len(feature_vectors[cohort])
ax = pl.gca()
pl.bar(range(n), feature_vectors[cohort], color = '0.75')
# pl.title('Randomized logistic Regression: %s' % cohort, fontsize=fontsize)
ax.set_xlabel("Feature number", fontsize=fontsize)
ax.set_ylabel("Average feature weight", fontsize=fontsize)
ax.set_xticks(range(n))
ax.set_xticklabels(features,fontsize=AUC_fontsize, rotation='vertical')
utils.save_fig("/home/colin/evo/papers/thesis/figures/logreg/randomized_%s" % cohort)
# pl.show()
# break
pl.clf()
for cohort in cohorts:
in_file = "results/randomized_logistic_reg_features_%s_time_averaged.csv" % cohort
data = np.genfromtxt(in_file, delimiter=",")[1:, :-1]
n = len(data)
for i in range(n):
if np.all(data[:,i]==0):
n = i
data = data[:n,:n]
for col in range(n):
data[:, col] /= norm(data[:, col])
def plot_scatter(xs,
ys,
line_labels=None,
xaxis_label=None,
yaxis_label=None,
xticks=None,
vlines=None,
vlines_kwargs=None,
hlines=None,
hlines_kwargs=None,
x_sci=True,
y_sci=True,
y_lim=None,
legend_top=True,
fig_size=None,
ls_cycle=False,
name=None):
multiple_x = utils.is_list_of_list(xs)
multiple_y = utils.is_list_of_list(ys)
multiple_line_label = utils.is_list(line_labels)
assert multiple_x == multiple_y == multiple_line_label
fig, ax = plt.subplots()
if fig_size and isinstance(fig_size, list) and len(fig_size) > 0:
if len(fig_size) == 1:
fig.set_figwidth(fig_size[0])
else:
fig.set_figwidth(fig_size[0])
fig.set_figheight(fig_size[1])
colors = iter(cm.rainbow(np.linspace(0, 1, len(ys))))
if multiple_x:
for x, y, line_label in zip(xs, ys, line_labels):
ax.scatter(x, y, label=line_label, c=next(colors))
else:
ax.scatter(xs, ys, label=line_labels, c=next(colors))
if xticks and isinstance(xticks, list):
x = xs[0] if multiple_x else xs
plt.xticks(x, xticks)
if y_lim and isinstance(y_lim, list) and len(y_lim) > 0:
if len(y_lim) == 1:
plt.ylim(ymin=y_lim[0])
else:
plt.ylim(ymin=y_lim[0])
plt.ylim(ymax=y_lim[1])
plt.xlim(xmin=0)
ncol = len(xs) if multiple_x else 1
utils.set_legend(legend_top, ncol)
utils.set_sci_axis(ax, x_sci, y_sci)
utils.set_axis_labels(ax, xaxis_label, yaxis_label)
vlines = vlines or []
for xvline in vlines:
with ALTERNATIVE_PALETTE:
plt.axvline(x=xvline, **vlines_kwargs)
hlines = hlines or []
for yhline in hlines:
with ALTERNATIVE_PALETTE:
plt.axhline(y=yhline, **hlines_kwargs)
utils.finalize(ax)
utils.save_fig(name)
lead = int(float((lead))) -1
lag = int(float((lag)))-1
week= lead+lag
data[week,lag] = float(auc)
for week in range(n):
for lag in range(n):
if week >= lag:
pl.text(week - .3, lag - .1,((int)(100*data[week][lag]))/100.0,fontsize=AUC_fontsize)
ax = pl.gca()
pl.imshow(np.transpose(data), interpolation='nearest',origin='lower', vmin=0, vmax=1, cmap='RdBu')
ax.set_xlabel("The predicted week number", fontsize=fontsize)
ax.set_ylabel("Lag", fontsize=fontsize)
# pl.title('Logistic Regression AUC: %s' % cohort, fontsize=fontsize)
ax.set_xticks(range(n))
ax.set_yticks(range(n))
ax.set_xticklabels(range(2,n+2),fontsize=med_fontsize)
ax.set_yticklabels(range(1,n+1),fontsize=med_fontsize)
cb = pl.colorbar()
for t in cb.ax.get_yticklabels():
t.set_fontsize(med_fontsize)
utils.save_fig("/home/colin/evo/papers/thesis/figures/logreg/%s" % cohort)
# print cohort, np.nanmean(data)
# pl.show()
# break
def plot_line(xs,
ys,
line_labels=None,
xaxis_label=None,
yaxis_label=None,
xticks=None,
vlines=None,
vlines_kwargs=None,
hlines=None,
hlines_kwargs=None,
x_sci=True,
y_sci=True,
y_lim=None,
x_lim=None,
legend_top=True,
ls_cycle=False,
marker_size=0,
x_grid=True, y_grid=True,
fig_size=None,
name=None, draw_arrow=False):
multiple_x = utils.is_list_of_list(xs)
multiple_y = utils.is_list_of_list(ys)
multiple_line_label = utils.is_list(line_labels)
assert multiple_x == multiple_y == multiple_line_label
fig, ax = plt.subplots()
if fig_size and isinstance(fig_size, list) and len(fig_size) > 0:
if len(fig_size) == 1:
fig.set_figwidth(fig_size[0])
else:
fig.set_figwidth(fig_size[0])
fig.set_figheight(fig_size[1])
ls_cycler = utils.get_line_styles_cycler(ls_cycle)
ms_cycler = utils.get_marker_styles_cycler(marker_size > 0)
if multiple_x:
for x, y, line_label in zip(xs, ys, line_labels):
ax.plot(x, y, label=line_label, ls=next(ls_cycler), marker=next(ms_cycler), markersize=marker_size)
else:
ax.plot(xs, ys, label=line_labels)
if xticks and isinstance(xticks, list):
x = xs[0] if multiple_x else xs
plt.xticks(x, xticks)
if y_lim and isinstance(y_lim, list) and len(y_lim) > 0:
if len(y_lim) == 1:
plt.ylim(ymin=y_lim[0])
else:
plt.ylim(ymin=y_lim[0])
plt.ylim(ymax=y_lim[1])
if x_lim and isinstance(x_lim, list) and len(x_lim) > 0:
if len(x_lim) == 1:
plt.xlim(xmin=x_lim[0])
else:
plt.xlim(xmin=x_lim[0])
plt.xlim(xmax=x_lim[1])
ncol = len(xs) if multiple_x else 1
utils.set_legend(legend_top, ncol)
utils.set_sci_axis(ax, x_sci, y_sci)
utils.set_axis_labels(ax, xaxis_label, yaxis_label)
vlines = vlines or []
for xvline in vlines:
with ALTERNATIVE_PALETTE:
plt.axvline(x=xvline, **vlines_kwargs)
hlines = hlines or []
for yhline in hlines:
with ALTERNATIVE_PALETTE:
plt.axhline(y=yhline, **hlines_kwargs)
utils.finalize(ax, x_grid=x_grid, y_grid=y_grid)
utils.save_fig(name)
def visualize_feature_hist_dist(X,y,selected_feature,features,normalize=False):
"""
Visualize the histogram distribution of a feature
Keyword arguments:
X -- The feature vectors
y -- The target vector
selected_feature -- The desired feature to obtain the histogram
features -- Vector of feature names (X1 to XN)
normalize -- Whether to normalize the histogram (Divide by total)
"""
#create data
joint_data=np.column_stack((X,y))
column_names=features
#create dataframe
df=pd.DataFrame(data=joint_data,columns=column_names)
palette = sea.hls_palette()
#find number of unique values (groups)
unique_values=pd.unique(df[[selected_feature]].values.ravel())
unique_values=map(int, unique_values)
unique_values.sort()
n_groups=len(unique_values)
fig, ax = plt.subplots()
index = np.arange(n_groups)
bar_width = 0.35
opacity = 0.4
#find values belonging to the positive class and values belonging to the negative class
positive_class_index=df[df[features[-1]] == 1].index.tolist()
negative_class_index=df[df[features[-1]] != 1].index.tolist()
positive_values=df[[selected_feature]].loc[positive_class_index].values.ravel()
positive_values=map(int, positive_values)
negative_values=df[[selected_feature]].loc[negative_class_index].values.ravel()
negative_values=map(int, negative_values)
#normalize data (divide by total)
n_positive_labels=n_negative_labels=1
if normalize==True:
n_positive_labels=len(y[y==1])
n_negative_labels=len(y[y!=1])
#count
positive_counts=[0]*len(index)
negative_counts=[0]*len(index)
for v in xrange(len(unique_values)):
positive_counts[v]=positive_values.count(v)/n_positive_labels
negative_counts[v]=negative_values.count(v)/n_negative_labels
#plot
plt.bar(index, positive_counts, bar_width,alpha=opacity,color='b',label='Default') #class 1
plt.bar(index+bar_width, negative_counts, bar_width,alpha=opacity,color='r',label='Paid') #class 0
plt.xlabel(selected_feature)
plt.ylabel('Frequency')
if normalize:
plt.ylabel('Proportion')
plt.title("Normalized Histogram Distribution of the feature '"+selected_feature+"' grouped by class")
plt.xticks(index + bar_width, map(str, unique_values) )
plt.legend()
plt.tight_layout()
# plt.show()
#save fig
output_dir = "img"
save_fig(output_dir,'{}/{}_hist_dist.png'.format(output_dir,selected_feature))