def basic_conv(n=3, epochs=60):
nets = [] # list of networks (for ensemble, if desired)
for j in range(n):
net = Network([
ConvLayer(image_shape=(mini_batch_size, 1, 64, 512),
filter_shape=(20, 1, 3, 3),
stride=(1, 1),
activation_fn=relu),
ConvPoolLayer(image_shape=(mini_batch_size, 20, 64, 512),
filter_shape=(40, 20, 3, 3),
stride=(1, 1),
poolsize=(2, 2),
activation_fn=relu),
ConvPoolLayer(image_shape=(mini_batch_size, 40, 32, 256),
filter_shape=(80, 40, 3, 3),
stride=(1, 1),
poolsize=(2, 2),
activation_fn=relu),
FullyConnectedLayer(n_in=80 * 16 * 128, n_out=100),
SoftmaxLayer(n_in=100, n_out=2)
], mini_batch_size, 50)
net.SGD(train_data,
epochs,
mini_batch_size,
0.1,
validation_data,
test_data,
lmbda=0.0)
nets.append(net) # Add current network to list
return nets
def main():
"""use validation set to tune hyper parameters"""
train, val, test = load_data_wrapper()
model = Network([784, 60, 10])
model.SGD(train, 30, 10, 2.5, val)
print('Evaluation on test: {0} / {1}'.format(model.evaluate(test),
len(test)))
def train(hidden_layers):
training_data, validation_data, test_data = mnist_loader.load_data_wrapper(
)
network = Network([784] + hidden_layers)
network.SGD(training_data,
epochs=30,
learning_rate=10,
mini_batch_size=3.0,
test_data=test_data)
def main():
"""main logic"""
# this load_data_wrapper function is modified version
train, val, test = load_data_wrapper()
model = Network([784, 30, 10])
model.SGD(train, 30, 10, 3, val)
print('Evaluation on test: {0} / {1}'.format(model.evaluate(test),
len(test)))
def main():
training_data, validation_data, test_data = load_data_wrapper()
epoch = 50
net = Network([784, 40, 10])
net.SGD(list(training_data), epoch, 20, 4.0, test_data=list(test_data))
Epoch = np.arange(1, epoch + 1)
Accuracy = np.array(net.test_result) / 100
plt.plot(Epoch, Accuracy, '.')
plt.show()
def run_network(training_data, validation_data, test_data):
#~ net = Network([784, 30, 10])
net = Network([784, 10])
epochs = 30
mini_batch_size = 10
eta = 3.0 # learning rate
net.SGD(training_data, epochs, mini_batch_size, eta, test_data=test_data)
return 0
def main():
train, val, test = load_data_wrapper()
# no hidden layer
print('=' * 20, 'model: no hidden layer', '=' * 20)
model1 = Network([784, 10])
model1.SGD(train, 30, 10, 3, val)
print('Evaluation on test: {0} / {1}'.format(model1.evaluate(test),
len(test)))
# small learning rate
print('=' * 20, 'model: small learning rate', '=' * 20)
model2 = Network([784, 30, 10])
model2.SGD(train, 30, 10, 0.1, val)
print('Evaluation on test: {0} / {1}'.format(model2.evaluate(test),
len(test)))
# large learning rate
print('=' * 20, 'model: large learning rate', '=' * 20)
model3 = Network([784, 30, 10])
model3.SGD(train, 30, 10, 30, val)
print('Evaluation on test: {0} / {1}'.format(model3.evaluate(test),
len(test)))
def basic_conv(n=3, epochs=60):
nets = [] # list of networks (for ensemble, if desired)
for j in range(n):
net = Network([
ConvPoolLayer(image_shape=(mini_batch_size, 1, 28, 28),
filter_shape=(20, 1, 5, 5), stride=(1, 1),
poolsize=(2, 2), activation_fn=relu),
ConvPoolLayer(image_shape=(mini_batch_size, 20, 14, 14),
filter_shape=(40, 20, 5, 5), stride=(1, 1),
poolsize=(2, 2), activation_fn=relu),
FullyConnectedLayer(n_in=40*7*7, n_out=100),
SoftmaxLayer(n_in=100, n_out=10)], mini_batch_size)
net.SGD(training_data, epochs, mini_batch_size, 0.1,
validation_data, test_data)
nets.append(net) # Add current network to list
return nets
class NeuralNet1(Algorithm):
def __init__(self, **hyperparas):
self.hyperparas = hyperparas
sizes = self.hyperparas.get('sizes', [784, 10])
self.model = Network(sizes)
def train(self):
# get hyper parameters
epochs = self.hyperparas.get('epochs', 30)
batch_size = self.hyperparas.get('batch_size', 10)
eta = self.hyperparas.get('eta', 1.0)
# get data
cwd = os.getcwd()
os.chdir(NNDL_PATH)
training_data, validation_data, test_data = load_data_wrapper()
os.chdir(cwd)
return self.model.SGD(training_data, epochs, batch_size, eta,
test_data)
def classify(self, data):
return self.model.feedforward(data)
def basic_conv(n=3, epochs=60):
nets = [] # list of networks (for ensemble, if desired)
for j in range(n):
net = Network([
ConvPoolLayer(image_shape=(mini_batch_size, 3, 32, 32),
filter_shape=(32, 3, 3, 3), stride=(1, 1),
poolsize=(2, 2), activation_fn=relu),
ConvPoolLayer(image_shape=(mini_batch_size, 32, 16, 16),
filter_shape=(80, 32, 3, 3), stride=(1, 1),
poolsize=(2, 2), activation_fn=relu),
ConvPoolLayer(image_shape=(mini_batch_size, 80, 8, 8),
filter_shape=(128, 80, 3, 3), stride=(1, 1),
poolsize=(2, 2), activation_fn=relu),
FullyConnectedLayer(n_in=128*4*4, n_out=100),
SoftmaxLayer(n_in=100, n_out=10)], mini_batch_size)
net.SGD(train_data, epochs, mini_batch_size, 0.01,
validation_data, test_data)
nets.append(net) # Add current network to list
return nets
import mnist_loader from network import Network training, validation, testing = mnist_loader.load_data_wrapper() net = Network([784, 25, 10]) res = net.SGD(training, 20, 15, 2.5, testing) print(res)
def main():
tries = 0
plays = 0
db_good = []
db_bad = []
minesweeper = Minesweeper()
# stores XY of mouse events
mouse_x = 0
mouse_y = 0
while True:
has_game_ended = False
game_over = False
minesweeper.new_game()
tries += 1
print('Jogo', tries)
# For random training
chosen_squares = []
chosen_squares_length = 1
# Main game loop
while not has_game_ended:
# Initialize variables
mouse_clicked = False
safe_squares = []
flagged_squares = []
new_position = False # For random training
# Draw screen
minesweeper.draw_field()
# Get Fred's AI input
if AI_TYPE == 'FRED':
info = minesweeper.available_info()
safe_squares, flagged_squares = minesweeper.get_AI_input(info)
# Get random position
if AI_TYPE == 'RANDOM':
while not new_position:
choice = [[random.choice(range(FIELDWIDTH)),random.choice(range(FIELDHEIGHT))]]
if minesweeper.revealed_boxes[choice[0][0]][choice[0][1]] == False:
new_position = True
safe_squares = choice
# Get player input
for event in pygame.event.get():
if event.type == QUIT or (event.type == KEYDOWN and (event.key == K_ESCAPE or event.key == K_q)):
minesweeper.terminate()
elif event.type == MOUSEMOTION:
mouse_x, mouse_y = event.pos
elif event.type == MOUSEBUTTONDOWN:
if event.button == LEFT_CLICK:
mouse_x, mouse_y = event.pos
mouse_clicked = True
box_x, box_y = minesweeper.get_box_at_pixel(mouse_x, mouse_y)
if box_x is not None and box_y is not None:
safe_squares = [(box_x, box_y)]
if event.button == RIGHT_CLICK:
mouse_x, mouse_y = event.pos
box_x, box_y = minesweeper.get_box_at_pixel(mouse_x, mouse_y)
if box_x is not None and box_y is not None:
flagged_squares = [(box_x, box_y)]
# Keeps track of chosen squares
if len(safe_squares) > 0:
chosen_squares.append(safe_squares)
# Checks if game is over for AI
if AI_TYPE != 'HUMAN':
if game_over:
has_game_ended = True
# Saves turn
if TRAINING and chosen_squares_length == len(chosen_squares):
turn = minesweeper.save_turn()
# Apply game changes
if not game_over:
for x, y in flagged_squares:
minesweeper.toggle_flag_box(x, y)
for x, y in safe_squares:
minesweeper._RESET_SURF, minesweeper._RESET_RECT = minesweeper.draw_smiley(WINDOWWIDTH/2, 50, 'check.png')
game_over = minesweeper.reveal_box(x, y)
#Add play to DB
if TRAINING and chosen_squares_length == len(chosen_squares) and len(safe_squares) > 0:
chosen_squares_length += 1
turn_chosen_square = minesweeper.save_chosen_square(safe_squares)
if minesweeper.mine_field[safe_squares[0][0]][safe_squares[0][1]] != 'X':
db_good.append((np.asarray(turn),np.asarray(turn_chosen_square)))
#print('GOOD', db_good[-1])
if minesweeper.mine_field[safe_squares[0][0]][safe_squares[0][1]] == 'X':
db_bad.append((np.asarray(turn),np.asarray(turn_chosen_square)))
#print('BAD', db_bad[-1])
plays += 1
if plays > TRAINING_COMPLETE:
db_good = minesweeper.data_treat(db_good)
db_bad = minesweeper.data_treat(db_bad)
print('GOOD',db_good[0])
print('BAD',db_bad[0])
div = int(len(db_good)*.8)
training_data = db_good[:div]
test_data = db_good[div:]
net = Network([FIELDHEIGHT*FIELDWIDTH, 32, 16, FIELDHEIGHT*FIELDWIDTH])
print('Network training started...\n')
net.SGD(training_data, 30, 10, 0.1, lmbda=5.0)
net.save('ANN_test')
print('score = {:.2f} %'.format(net.accuracy(test_data)/100))
minesweeper.terminate()
# Check if reset box is clicked
if minesweeper._RESET_RECT.collidepoint(mouse_x, mouse_y):
minesweeper.highlight_button(minesweeper._RESET_RECT)
if mouse_clicked:
minesweeper.new_game()
has_game_ended = True
# Highlight unrevealed box
box_x, box_y = minesweeper.get_box_at_pixel(mouse_x, mouse_y)
if box_x is not None and box_y is not None and not minesweeper.revealed_boxes[box_x][box_y]:
minesweeper.highlight_box(box_x, box_y)
# Update screen, wait clock tick
pygame.display.update()
minesweeper.clock.tick(FPS)
# net = Network([784, 512, 512, 10], training_images[:10000], training_labels[:10000], test_images[:1000], test_labels[:1000], validation_images[:1000], validation_labels[:1000])
# return net.SGD(20, eta, 128)
# from hyperopt import hp
# space = hp.uniform('eta', 0.0, 0.4)
# from hyperopt import fmin, tpe
# best = fmin(fn=optimize,
# space=space,
# algo=tpe.suggest,
# max_evals=100)
# print(best)
# # Train network
net = Network([784, 512, 512, 10], training_images, training_labels,
test_images, test_labels, validation_images, validation_labels)
net.SGD(35, 0.2, 128, monitor_text=True, optimizing=False)
# Best eta so far: 0.2
# Hyper-opt says: 0.38384960552488084
# Make 5 predictions using trained network for demonstration
images = np.zeros((5, 784))
guesses = []
confidences = []
for _ in range(5):
i = random.randint(0, len(validation_images) - 1)
images[_] = validation_images[i]
output = net.feedforward(validation_images[i])
guess = np.argmax(output)
confidence = round((output[0][guess] / np.sum(output)) * 100.0, 2)
guesses.append(guess)
confidences.append(confidence)
test_data = [(x.reshape(x.shape[0], 1), y) for x, y in zip(x_test, y_test)]
if __name__ == "__main__":
import sys
from network import Network
args = sys.argv
args.pop(0)
mini_batch_size = int(args[-3])
epoch = int(args[-2])
learning_rate = float(args[-1])
net = Network([784] + list(map(int, args[0:-3])) + [10])
print(
f"Network training started with\n"
f"input layer = 784 neurons,\n"
f"output layer = 10 neurons,\n"
f"{len(args[0:-3])} hidden layers = {', '.join(args[0:-3])} neurons\n"
f"mini batch size = {mini_batch_size}\nepochs = {epoch}\n"
f"learning rate = {learning_rate}\n")
net.SGD(training_data,
epoch,
mini_batch_size,
learning_rate,
test_data=test_data)
from network import cost_function
import numpy as np
nn = Network([3, 2, 2])
nn.biases = [np.array([[-1], [1]]), np.array([[1], [1]])]
nn.weights = [
np.array([[1, -1, 1], [-1, 1, -1]]),
np.array([[0.1, -0.5], [0.5, 0.6]])
]
x = np.array([[1], [2], [3]])
y = np.array([[0], [1]])
x1 = np.array([[0.9], [0], [1]])
y1 = np.array([[1], [0]])
t = x, y
t1 = x1, y1
t = [t, t1]
before = nn.feedforward(x)
print(before, cost_function(nn, t))
nn.SGD(training_data=t, epochs=1000, mini_batch_size=2, eta=1)
after = nn.feedforward(x)
after1 = nn.feedforward(x1)
print(after)
print(after1)
print(cost_function(nn, t))
def main():
""""""
train, val, test = load_data_wrapper()
model = Network([784, 60, 10])
model.SGD(train, 30, 10, 3, val)
print('Evaluation on test: {0} / {1}'.format(model.evaluate(test), len(test)))
# -*- coding: utf-8 -*-
"""
Created on Mon Jun 19 2017
Neural network example
"""
import numpy as np
import mnist_loader
from helpers import png2input
from network import Network
np.random.seed(420)
training_data, validation_data, test_data = mnist_loader.load_data_wrapper()
training_data = list(training_data)
test_data = list(test_data)
nn = Network([784, 30, 10])
nn.SGD(training_data, 30, 10, 2.5, test_data=test_data)
nn.save('data/example.npz')
# nn.load('data/example.npz')
print('score = {:.2f} %'.format(nn.evaluate(test_data)/100))
pix_data = png2input('data/example.png')
results = nn.feedforward(pix_data)
print('You wrote: {}'.format(np.argmax(results)))
for i in range(10):
print('{}: {:4.1f} %'.format(i, 100*results[i][0]))
vectorized_y[idx][label] = 1
data = []
for x, y in zip(xs, vectorized_y):
data.append((x.reshape(-1, 1).astype(float), y.reshape(-1, 1)))
else:
data = []
for x, y in zip(xs, ys):
data.append((x.reshape(-1, 1).astype(float), y.reshape(-1, 1)))
return data
train = mnist.train_images()[:-10000], mnist.train_labels()[:-10000]
validation = mnist.train_images()[-10000:], mnist.train_labels()[-10000:]
test = mnist.test_images(), mnist.test_labels()
train = format_data(*train)
validation = format_data(*validation, vector_y=False)
test = format_data(*test, vector_y=False)
# Build the network
net = Network([784, 50, 50, 10])
# Train the network
net.SGD(train, 30, 10, 3, validation)
# Test the network
print("Test data: {:3.2f}% correct".format(100 * net.evaluate(test) /
len(test)))
from network import Network
import numpy as np
import mnist_data_loader
training_set, validation_set, test_set = mnist_data_loader.load_data_customized(
)
net = Network([784, 30, 10])
#print('self.weights shape is ', net.weights[1].shape)
net.SGD(training_set, 30, 10, 3.0, test_set)
e[0][j] = 1.0
return e
def mse(output, target):
error = 0.0
target = vectorized_result(target)
for i in range(len(output[0])):
error += pow(abs(output[0][i] - target[0][i]), 2)
return error / 2
training_inputs, training_results, validation_inputs, validation_results, test_inputs, test_results = load_data_wrapper(
)
n = Network([784, 300, 10])
n.SGD(training_inputs, training_results, 0.3, 5000)
totalerror = 0
for i in range(10000):
k = np.random.randint(len(validation_inputs))
result = n.process(validation_inputs[k])
erro = mse(result, validation_results[k])
totalerror += erro
print("Erro = {}".format(erro))
print("CASE #{}:\n input[{}] = {} \nExpected = {}\n\n".format(
i, k, result, validation_results[k]))
avgerror = totalerror / 10000
right = 100 - avgerror * 100
print("Taxa de acerto: {}\nErro Médio: {}".format(right, avgerror))
import numpy as np
from network import Network
data = np.loadtxt("data.csv", delimiter=",")
test_index = np.random.choice([True, False],
len(data),
replace=True,
p=[0.25, 0.75])
test = data[test_index]
train = data[10:40]
train = [(d[:3][:, np.newaxis], np.eye(3, 1, k=-int(d[-1]))) for d in train]
test = [(d[:3][:, np.newaxis], d[-1]) for d in test]
input_count = 3 # 3 нейрона входного слоя
hidden_count = 6 # 5 нейронов внутреннего слоя
output_count = 3
nn = Network([input_count, hidden_count, output_count])
print(train[0])
nn.SGD(training_data=train, epochs=1, mini_batch_size=1, eta=1)
net = Network([
ConvPoolLayer(activation_fn=ReLU, image_shape=(mini_batch_size, 1, rows, cols),
filter_shape=(64, 1, 5, 10),
poolsize=(2, 2)),
ConvPoolLayer(activation_fn=ReLU,image_shape=(mini_batch_size, 64, 11, 79),
filter_shape=(64, 64, 4, 10),
poolsize=(2, 2)),
ConvPoolLayer(activation_fn=ReLU,image_shape=(mini_batch_size, 64, 4, 35),
filter_shape=(64, 64, 3, 10),
poolsize=(2,2)),
FullyConnectedLayer(activation_fn=ReLU, n_in=64*1*13, n_out=dim1, p_dropout=dropout),
FullyConnectedLayer( n_in=dim1, n_out=dim2, activation_fn=ReLU, p_dropout=dropout),
SoftmaxLayer(n_in=dim2, n_out=2, p_dropout=dropout)], mini_batch_size, c_prob)
net.SGD(train, num_epochs, mini_batch_size, 0.0005,
validation, test, lmbda=0.1, patience=patience)
net_best_accuracy.append(net.best_accuracy)
net_best_roc.append(net.best_auc_roc)
net_best_precision.append(net.best_precision)
net_best_recall.append(net.best_recall)
net_best_f_score.append(net.best_f_score)
net_best_predictions.append(net.best_predictions)
net_best_probs.append(net.best_prob)
save_network(net.best_state, dir)
#Record Results
dir = "../data/" + dset + "/data_sets/"
f = open(dir + "/" + prefix + "results_PopPhy.txt", 'w')
f.write("Mean Accuracy: " + str(np.mean(net_best_accuracy)) + " (" + str(np.std(net_best_accuracy)) + ")\n")
import mnist_loader
from network import Network
training_data, validation_data, test_data = mnist_loader.load_data_wrapper()
net = Network([784, 30, 10], random_init=False)
net.SGD(training_data=training_data,
epochs=30,
mini_batch_size=10,
eta=3.0,
test_data=test_data,
random_shuffle=True)
output_neurons = int(input("Enter number of output neurons "))
#create neural network
neural = Network([input_neurons, hidden_neurons, output_neurons])
neural = Network([1300, 500, 50, 3])
#print "neural weights :",neural.weights
#print "neural biases :", neural.biases
#training_data = create_training_data("nn_data.txt")
#testing_data = create_training_data("nn_data.txt")
# 2-n-2 Architecture
#training_data = [(numpy.array([[1],[0]]),numpy.array([[0],[1]])),(numpy.array([[1],[1]]),numpy.array([[1],[0]])),(numpy.array([[0],[0]]),numpy.array([[1],[0]])),(numpy.array([[0],[1]]),numpy.array([[0],[1]]))]
#testing_data = [(numpy.array([[0],[0]]),numpy.int(0)),(numpy.array([[1],[1]]),numpy.int(0)),(numpy.array([[1],[0]]),numpy.int(1)),(numpy.array([[0],[1]]),numpy.int(1))]
#2-n-1 Architecture
#training_data = [(numpy.array([[1],[0]]),numpy.array([[1]])),(numpy.array([[1],[1]]),numpy.array([[0]])),(numpy.array([[0],[0]]),numpy.array([[0]])),(numpy.array([[0],[1]]),numpy.array([[1]]))]
#testing_data = [(numpy.array([[0],[0]]),numpy.int(0)),(numpy.array([[1],[1]]),numpy.int(0)),(numpy.array([[1],[0]]),numpy.int(1)),(numpy.array([[0],[1]]),numpy.int(1))]
'''
from truth_table import xor_data_generator
training_data, testing_data = xor_data_generator(input_neurons,80)
#print training_data
#print testing_data
'''
training_data, testing_data = create_training_data("nn_data.txt", 3, 80)
print testing_data
neural.SGD(training_data, 100000, len(training_data), 0.2, testing_data)
def main():
""" Executes the required calculations for an event, prints raw data and creates a graph. """
args = sys.argv
global ax1
if len(args) <= 1 or not args[1].isdigit():
print("Usage: python train.py NUM_CORES")
exit()
num_cores = int(args[1])
#fig = plt.figure(figsize=(7, 7))
fig2 = plt.figure(figsize=(7, 7))
fig3 = plt.figure(figsize=(7, 7))
#ax1 = fig.add_subplot(111)
plt.ion()
network_size = [LightCurve.INPUT_SIZE, 8, 8, LightCurve.OUTPUT_SIZE]
nn = Network(network_size)
recent_progress = []
types = [MicroLensing, NonEvent, Periodic]
labels = [
'AC_std', 'AC_max', 'SYM_std', 'SYM_max', 'excursion_diff',
'excursion_above', 'excursion_below', 'noise', 'slope', 'power_peak',
'power_mean'
]
labels += ["" for i in range(sum(network_size[1:-1]))]
labels += [ev().__class__.__name__ for ev in types]
q = mp.Queue(maxsize=3000)
pool = mp.Pool(num_cores,
initializer=generation_process,
initargs=(q, types))
accuracies = []
total_gen = 0
iterations = 0
rolling_accuracies = [[], [], []]
batch_size = 1000
batches_per_save = 30
while True:
training_data = [q.get() for _ in range(batch_size)]
total_gen += len(training_data)
iterations += 1
#draw_plot(get_event(types))
_, _, _, training_accuracy = nn.SGD(np.array(training_data),
10,
250,
0.35,
monitor_training_accuracy=True)
avg_acc = sum(training_accuracy) / len(training_accuracy) / len(
training_data)
accuracies.insert(0, avg_acc)
accuracies = accuracies[:300]
sys.stdout.flush()
if iterations % batches_per_save == 0:
ax2 = fig2.gca()
draw_neural_net(ax2, .05, .95, .08, .98, nn, None, labels)
avg_acc_300 = sum(accuracies) / len(accuracies)
avg_acc_150 = sum(accuracies[:150]) / min(len(accuracies), 150)
avg_acc_50 = sum(accuracies[:50]) / min(len(accuracies), 50)
rolling_accuracies[0].append(round(100 * avg_acc_300, 2))
rolling_accuracies[1].append(round(100 * avg_acc_150, 2))
rolling_accuracies[2].append(round(100 * avg_acc_50, 2))
txt = ax2.text(0.5,
0.06,
"Current accuracy: " +
str(round(100 * avg_acc_150, 2)) + "%",
color="#000000FF",
ha='center',
va='center')
txt = ax2.text(0.5,
0.03,
"Total lightcurves generated: " +
human_format(total_gen),
color="#000000FF",
ha='center',
va='center')
txt = ax2.text(
0.5,
0,
datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
color="#666666FF",
ha='center',
va='center')
nn.save(datetime.datetime.now().strftime("NN-%Y-%m-%d.json"))
ax3 = fig3.gca()
accuracy_x = np.linspace(
0,
len(rolling_accuracies[0]) * batch_size * batches_per_save,
len(rolling_accuracies[0]))
ax3.plot(accuracy_x,
rolling_accuracies[0],
color=(0, 0, 1, 1),
label='Last 300K')
ax3.plot(accuracy_x,
rolling_accuracies[1],
color=(0, 0, 1, 0.5),
label='Last 150K')
ax3.plot(accuracy_x,
rolling_accuracies[2],
color=(0, 0, 1, 0.25),
label='Last 50K')
ax3.legend()
ax3.set_xlabel("Lightcurves Processed")
ax3.set_ylabel("Average Accuracy (%)")
ax3.set_title("Network Accuracy")
fig3.savefig('accuracy.png')
fig3.clf()
fig2.savefig('nn.png')
fig2.clf()
from network import Network from cost_function import CrossEntropyCost from activation_function import Sigmoid import numpy as np import mnist_loader training_data, validation_data, test_data = mnist_loader.load_data_wrapper() net = Network([784, 30, 10], CrossEntropyCost, Sigmoid) net.SGD(training_data, 30, 10, 0.1, 5.0, 0.2, test_data)
#measure execution time
start = time.time()
#train a new network using test and validation data
net = Network(network.getLayers(20, 0.5), writer, 20, "./network")
net.MBSGD(training_data, validation_data, test_data, 16, 0.1, 0.1, 0.008,
False)
net.save()
"""
#optimize parameters to a network setup with validation data
optimize(training_data, validation_data, test_data, writer)
"""
"""
#load the network 'network' and train it for 16 epochs, then save it as 'network2'
net = network.load("./network")
net.writer = writer
net.SGD(training_data, validation_data, test_data, 16, 0.1, 0.1, 0.008, False)
net.save("./network2")
"""
"""
#load these networks and do an ensemble classification on the provided data, storing wrong classifications as .csv
ensemble(["./Nets/storedNet1", "./Nets/storedNet2", "./Nets/storedNet3", "./Nets/storedNet4", "./Nets/multitrain1", "./Nets/obstructed_final",
"./Nets/loweredcontrast_final", "./Nets/blurred_final", "./Nets/obstructed_longTraining", "./Nets/obstructed_final_2",
"./Nets/contrastlowered_final_2", "./Nets/blurred_final_2"], test_data, test_names)
"""
# FullyConnectedLayer(n_in = nFilters*pooledImageSize**2, n_out = gridsize**2)],mini_batch_size)
#2 Layer FC Net
# net = Network([
# FullyConnectedLayer(n_in = imagesize**2, n_out = 30),FullyConnectedLayer(n_in = 30, n_out = 9) ], mini_batch_size)
#1 Layer FC Net
net = Network([FullyConnectedLayer(n_in=imagesize**2, n_out=gridsize**2)],
mini_batch_size)
#Attempt Stochastic Gradient Descent
#-----------------------------------
weights, biases = net.SGD(training_data,
nEpochs,
mini_batch_size,
eta,
validation_data,
test_data,
lmbda=lmb)
for N, w in enumerate(weights):
print('Weights for layer %d have shape:' % N)
print(w.shape)
for N, b in enumerate(biases):
print('Biases for layer %d have shape:' % N)
print(b.shape)
#Save data
#---------
#Save results as a dictionary!
# ----------------------
# - network.py example:
import network
from network import Network, ConvPoolLayer, FullyConnectedLayer, SoftmaxLayer # softmax plus log-likelihood cost is more common in modern image classification networks.
# read data:
training_data, validation_data, test_data = network.load_data_shared()
# mini-batch size:
mini_batch_size = 10
from network import ReLU
net = Network([
ConvPoolLayer(image_shape=(mini_batch_size, 1, 28, 28),
filter_shape=(20, 1, 5, 5),
poolsize=(2, 2),
activation_fn=ReLU),
ConvPoolLayer(image_shape=(mini_batch_size, 20, 12, 12),
filter_shape=(40, 20, 5, 5),
poolsize=(2, 2),
activation_fn=ReLU),
FullyConnectedLayer(n_in=40 * 4 * 4, n_out=100, activation_fn=ReLU),
SoftmaxLayer(n_in=100, n_out=10)
], mini_batch_size)
net.SGD(training_data,
60,
mini_batch_size,
0.03,
validation_data,
test_data,
lmbda=0.1)
from network import Network
import mnist_loader
import matplotlib.cm as cm
import matplotlib.pyplot as plt
training_data, validation_data, test_data = mnist_loader.load_data_wrapper()
net = Network([784, 16, 10])
print("Created network")
net.SGD(training_data, 30, 10, 1.0, test_data=test_data)
raw_pixels, pixel_vector, expected = mnist_loader.load_random_image()
def toNumber(array):
array = array.reshape(10)
max = 0
for pos in range(1, 10):
if (array[pos] > array[max]):
max = pos
return max
result = net.feedforward(pixel_vector)
print(toNumber(result))
print("Is correct? {}".format(expected == toNumber(result)))
plt.imshow(raw_pixels.reshape((28, 28)), cmap=cm.Greys_r)
plt.show()