def main():
"""Trains a NN."""
# Hyper-parameters. Modify them if needed.
""" num_hiddens = [16, 32]
eps = 0.01
momentum = 0.0
num_epochs = 1000
batch_size = 100
"""
# Input-output dimensions.
num_inputs = 2304
num_outputs = 7
# Initialize model.
model = InitNN(num_inputs, num_hiddens, num_outputs)
# Uncomment to reload trained model here.
model = Load('nn_model_20.npz')
stats = Load('nn_stats_20.npz')
title1 = 'nn momentum=0.9 8 16 Cross Entropy'
title2 = 'nn momentum=0.9 8 16 Accuracy'
DisplayPlot(stats['train_ce'], stats['valid_ce'], 'Cross Entropy', title1,number=0)
DisplayPlot(stats['train_acc'], stats['valid_acc'], 'Accuracy', title2,number=1)
"""
stats = {
'train_ce': train_ce_list,
'valid_ce': valid_ce_list,
'train_acc': train_acc_list,
'valid_acc': valid_acc_list}
"""
# Check gradient implementation.
print('Checking gradients...')
x = np.random.rand(10, 48 * 48) * 0.1
CheckGrad(model, NNForward, NNBackward, 'W3', x)
CheckGrad(model, NNForward, NNBackward, 'b3', x)
CheckGrad(model, NNForward, NNBackward, 'W2', x)
CheckGrad(model, NNForward, NNBackward, 'b2', x)
CheckGrad(model, NNForward, NNBackward, 'W1', x)
CheckGrad(model, NNForward, NNBackward, 'b1', x)
def main():
"""Trains a NN."""
model_fname = 'nn_model.npz'
stats_fname = 'nn_stats.npz'
# Hyper-parameters. Modify them if needed.
num_hiddens = [16, 32]
eps = 0.01
momentum = 0.5
num_epochs = 1000
batch_size = 100
# Input-output dimensions.
num_inputs = 2304
num_outputs = 7
# Initialize model.
model = InitNN(num_inputs, num_hiddens, num_outputs)
# Uncomment to reload trained model here.
model = Load(model_fname)
# Check gradient implementation.
print('Checking gradients...')
x = np.random.rand(10, 48 * 48) * 0.1
CheckGrad(model, NNForward, NNBackward, 'W3', x)
CheckGrad(model, NNForward, NNBackward, 'b3', x)
CheckGrad(model, NNForward, NNBackward, 'W2', x)
CheckGrad(model, NNForward, NNBackward, 'b2', x)
CheckGrad(model, NNForward, NNBackward, 'W1', x)
CheckGrad(model, NNForward, NNBackward, 'b1', x)
# Train model.
stats = Train(model, NNForward, NNBackward, NNUpdate, eps, momentum,
num_epochs, batch_size)
def load_aug_data():
train_file = '../411a3/train_aug.npz'
train = Load(train_file)
X_train = train['X_train']
y_train = train['y_train']
X_test = train['X_test']
y_test = train['y_test']
rnd_idx = np.arange(X_train.shape[0])
np.random.shuffle(rnd_idx)
X_train = X_train[rnd_idx]
y_train = y_train[rnd_idx]
X_train = X_train.reshape((-1, 1, 32, 30))
X_test = X_test.reshape((-1, 1, 32, 30))
X_train = X_train.astype('float32')
X_test = X_test.astype('float32')
y_train = y_train.astype('int32')
y_test = y_test.astype('int32')
# print('X_train shape:', X_train.shape)
# print('X_test shape:', X_test.shape)
# print('y_train shape:', y_train.shape)
# print('y_test shape:', y_test.shape)
return (X_train, y_train), (X_test, y_test)
def main():
"""Trains a CNN."""
model_fname = 'cnn_model.npz'
stats_fname = 'cnn_stats.npz'
# Hyper-parameters. Modify them if needed.
eps = 0.1
momentum = 0
num_epochs = 30
filter_size = 5
num_filters_1 = 8
num_filters_2 = 16
batch_size = 100
# Input-output dimensions.
num_channels = 1
num_outputs = 7
# Initialize model.
model = InitCNN(num_channels, filter_size, num_filters_1, num_filters_2,
num_outputs)
# Uncomment to reload trained model here.
model = Load(model_fname)
ShowMeans2(model['W1'], 0)
# Check gradient implementation.
print('Checking gradients...')
x = np.random.rand(10, 48, 48, 1) * 0.1
CheckGrad(model, CNNForward, CNNBackward, 'W3', x)
CheckGrad(model, CNNForward, CNNBackward, 'b3', x)
CheckGrad(model, CNNForward, CNNBackward, 'W2', x)
CheckGrad(model, CNNForward, CNNBackward, 'b2', x)
CheckGrad(model, CNNForward, CNNBackward, 'W1', x)
CheckGrad(model, CNNForward, CNNBackward, 'b1', x)
def plot_first_filters(model_fname):
model = Load(model_fname)
W1 = model['W1']
plt.clf()
for i in xrange(W1.shape[3]):
plt.subplot(1, W1.shape[3], i + 1)
plt.imshow(W1[:, :, 0, i], cmap=plt.cm.gray)
plt.savefig('visualization/cnn_first_layer_filters.png')
print("cnn_first_layer_filters.png saved")
def plot_figures(stats_fname):
stats = Load(stats_fname)
train_ce_list = stats['train_ce']
valid_ce_list = stats['valid_ce']
train_acc_list = stats['train_acc']
valid_acc_list = stats['valid_acc']
figure_path = get_cnn_path(stats_fname)
save_figure(train_ce_list, valid_ce_list, 'Cross Entropy', figure_path)
save_figure(train_acc_list, valid_acc_list, 'Accuracy', figure_path)
print('Figures saved to ' + figure_path)
def _get_generator_list(self, dst_node, para_list):
"""returns the default generator list"""
res = []
for state in para_list:
s = Load(state)
s['ipsrc'] = choose_ip_addr(self.ipdests).rsplit('/')[0]
s['ipdst'] = choose_ip_addr(dst_node.ipdests).rsplit('/')[0]
gen = get_generator(s)
res.append(gen)
return res
def _config_traffic(self):
nn = len(self.net.node_list)
srv_node_list = [self.net.node_list[i] for i in xrange(nn) if i in self.net.net_desc['srv_list'] ]
start, end = self.ano_desc['T']
for srv_node in srv_node_list:
gen_desc = Load(self.ano_desc['gen_desc'])
gen_desc['ipsrc'] = choose_ip_addr(self.ano_node.ipdests).rsplit('/')[0]
gen_desc['ipdst'] = choose_ip_addr(srv_node.ipdests).rsplit('/')[0]
self.ano_node.add_modulator(start=str(start),
profile='((%d,),(1,))' %(end-start),
generator=get_generator(gen_desc) )
def load_data():
nb_test = 350
train_file = '../411a3/train.npz'
train = Load(train_file)
X_train = train['X_train']
y_train = train['y_train']
rnd_idx = np.arange(X_train.shape[0])
np.random.shuffle(rnd_idx)
X_train = X_train[rnd_idx]
y_train = y_train[rnd_idx]
X_train = X_train.reshape((-1, 1, 32, 30))
return (X_train[nb_test:], y_train[nb_test:]), (X_train[:nb_test],
y_train[:nb_test])
def main():
"""Trains a NN."""
model_fname = 'nn_model.npz'
stats_fname = 'nn_stats.npz'
# Hyper-parameters. Modify them if needed.
num_hiddens = [16, 32]
eps = 0.01
momentum = 0.3
num_epochs = 250
batch_size = 100
# 100 default
# Input-output dimensions.
num_inputs = 2304
num_outputs = 7
# Initialize model.
model = InitNN(num_inputs, num_hiddens, num_outputs)
model['v'] = momentum
# Uncomment to reload trained model here.
model = Load(model_fname)
#ShowMeans(model['W1'],0)
inputs_train, inputs_valid, inputs_test, target_train, target_valid, target_test = LoadData(
'../toronto_face.npz')
var = NNForward(model, inputs_train[119, :])
y = var['y']
y = Softmax(y)
t = target_train[119, :]
plotProb(y, t)
# Check gradient implementation.
print('Checking gradients...')
x = np.random.rand(10, 48 * 48) * 0.1
CheckGrad(model, NNForward, NNBackward, 'W3', x)
CheckGrad(model, NNForward, NNBackward, 'b3', x)
CheckGrad(model, NNForward, NNBackward, 'W2', x)
CheckGrad(model, NNForward, NNBackward, 'b2', x)
CheckGrad(model, NNForward, NNBackward, 'W1', x)
CheckGrad(model, NNForward, NNBackward, 'b1', x)
import matplotlib.pyplot as plt
#stats_fname = 'nn_stats.npz'
#stats_fname = 'cnn_stats.npz'
#stats_fname = 'cnn_stats_32_eps99.npz'
#stats_fname = 'cnn_stats_32_mom09.npz'
#stats_fname = 'cnn_stats_32_batch150.npz'
#stats_fname = 'nn_stats_33_50_100.npz'
stats_fname = 'cnn_stats_33_5_10.npz'
stats = Load(stats_fname)
train = np.array(stats['train_ce'])
valid = np.array(stats['valid_ce'])
plt.figure(1)
plt.plot(train[:, 0], train[:, 1], 'b', label='Train', color='r')
plt.plot(valid[:, 0], valid[:, 1], 'g', label='Validation', color='c')
plt.xlabel('Epoch')
plt.ylabel('Cross Entropy')
plt.title('Training and Validation Entropies of CNN with Filters=5;10')
plt.legend()
plt.show()
def count_probability(x, model_fname, forward):
model = Load(model_fname)
var = forward(model, x)
return Softmax(var['y'])
def load_val_data():
val_file = '../411a3/val.npz'
val = Load(val_file)
X_val = val['X_val']
X_val = X_val.reshape((-1, 1, 32, 30))
return X_val
from util import LoadData, Load, Save, DisplayPlot
def ShowMeans(means, number=0):
"""Show the cluster centers as images."""
plt.figure(number)
plt.clf()
for i in xrange(means.shape[1]):
plt.subplot(1, means.shape[1], i + 1)
plt.imshow(means[:, i].reshape(48, 48), cmap=plt.cm.gray)
plt.draw()
raw_input('Press Enter.')
def ShowMeansCNN(means, number=0):
"""Show the cluster centers as images."""
plt.figure(number)
plt.clf()
for i in xrange(means.shape[3]):
plt.subplot(1, means.shape[3], i + 1)
plt.imshow(means[:, :, 0, i], cmap=plt.cm.gray)
plt.draw()
raw_input('Press Enter.')
nn = Load('nn_model.npz')
ShowMeans(nn['W1'], number=0)
cnn = Load('cnn_model.npz')
ShowMeansCNN(cnn['W1'], number=1)
# -*- coding: utf-8 -*-
"""
Created on Sun Nov 13 23:14:04 2016
3.4 Plots first layer of weights
@author: risal
"""
from util import Load, Save, DisplayPlot
import matplotlib.pylab as plt
import numpy as np
from nn import Softmax
fname_1 = 'nn_model_confidence.npz'
fname_2 = 'cnn_model_batch_500.npz'
nn_model = Load(fname_1)
cnn_model = Load(fname_2)
#DisplayPlot(stats['train_ce'], stats['valid_ce'], 'Cross Entropy', number=0)
#DisplayPlot(stats['train_acc'], stats['valid_acc'], 'Accuracy', number=1)
def ShowWeightsNN(weights, number=0):
"""Show the weights centers as images."""
plt.figure(number)
plt.clf()
for i in xrange(weights.shape[1]):
plt.subplot(1, weights.shape[1], i+1)
plt.imshow(weights[:, i].reshape(48, 48), cmap=plt.cm.gray)
plt.draw()
raw_input('Press Enter.')
def main():
"""Trains a NN."""
model_fname = 'nn_model.npz'
stats_fname = 'nn_stats.npz'
# Hyper-parameters. Modify them if needed.
num_hiddens = [16, 32] #[150,20] [6,2] [200, 140]
eps = [0.01] #[0.001, 0.01, 0.1, 0.5, 1.0]
momentum = [0.9] #[0.0, 0.45, 0.9]
num_epochs = 1000
batch_size = [100] #[1, 10, 100, 500, 1000]
# Input-output dimensions.
num_inputs = 2304
num_outputs = 7
# Initialize model.
model = InitNN(num_inputs, num_hiddens, num_outputs)
# Uncomment to reload trained model here.
model = Load(
"C:\\Users\\Adam\\Documents\\Masters\\Machine Learning\\A2\\NN\\NN_Results\\0.01\\0.0\\100\\nn_model.npz"
)
# Check gradient implementation.
print('Checking gradients...')
x = np.random.rand(10, 48 * 48) * 0.1
CheckGrad(model, NNForward, NNBackward, 'W3', x)
CheckGrad(model, NNForward, NNBackward, 'b3', x)
CheckGrad(model, NNForward, NNBackward, 'W2', x)
CheckGrad(model, NNForward, NNBackward, 'b2', x)
CheckGrad(model, NNForward, NNBackward, 'W1', x)
CheckGrad(model, NNForward, NNBackward, 'b1', x)
print("passed grad check")
inputs_train, inputs_valid, inputs_test, target_train, target_valid, target_test = LoadData(
'../toronto_face.npz')
#print(inputs_test.shape)
Evaluate(inputs_test, target_test, model, NNForward, 1)
for e in eps:
for m in momentum:
for b in batch_size:
model = InitNN(num_inputs, num_hiddens, num_outputs)
# Train model.
dir = str(e) + "\\" + str(m) + "\\" + str(b) + "\\"
if os.path.exists(dir):
filelist = [
f for f in os.listdir(".") if f.endswith(".bak")
]
for f in filelist:
os.remove(f)
else:
os.makedirs(dir)
model, stats = Train(model, NNForward, NNBackward, NNUpdate, e,
m, num_epochs, b)
# Uncomment if you wish to save the model.
Save(dir + model_fname, model)
# Uncomment if you wish to save the training statistics.
Save(dir + stats_fname, stats)
SavePlot(0, dir + "cross_entropy.png")
SavePlot(1, dir + "accuracy.png")