神经网络与深度学习-Neural Network and Deep Learning-Python3.5代码
神经网络与深度学习-Neural Network and Deep Learning-Python3.5代码
代码片段和文件信息
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
目录 0 2018-04-19 05:36 DeepLearningPython35-master
文件 12 2018-04-19 05:36 DeepLearningPython35-master.gitignore
文件 492526 2018-04-19 05:36 DeepLearningPython35-masterMyNetwork
文件 619 2018-04-19 05:36 DeepLearningPython35-masterREADME.md
文件 1982 2018-04-19 05:36 DeepLearningPython35-masterexpand_mnist.py
文件 17051982 2018-04-19 05:36 DeepLearningPython35-mastermnist.pkl.gz
文件 2673 2018-04-19 05:36 DeepLearningPython35-mastermnist_average_darkness.py
文件 3425 2018-04-19 05:36 DeepLearningPython35-mastermnist_loader.py
文件 770 2018-04-19 05:36 DeepLearningPython35-mastermnist_svm.py
文件 6399 2018-04-19 05:36 DeepLearningPython35-master
etwork.py
文件 15252 2018-04-19 05:36 DeepLearningPython35-master
etwork2.py
文件 13000 2018-04-19 05:36 DeepLearningPython35-master
etwork3.py
文件 7394 2018-04-19 05:36 DeepLearningPython35-master est.py
“““expand_mnist.py
~~~~~~~~~~~~~~~~~~
Take the 50000 MNIST training images and create an expanded set of
250000 images by displacing each training image up down left and
right by one pixel. Save the resulting file to
../data/mnist_expanded.pkl.gz.
Note that this program is memory intensive and may not run on small
systems.
“““
from __future__ import print_function
#### Libraries
# Standard library
import cPickle
import gzip
import os.path
import random
# Third-party libraries
import numpy as np
print(“Expanding the MNIST training set“)
if os.path.exists(“../data/mnist_expanded.pkl.gz“):
print(“The expanded training set already exists. Exiting.“)
else:
f = gzip.open(“../data/mnist.pkl.gz“ ‘rb‘)
training_data validation_data test_data = cPickle.load(f)
f.close()
expanded_training_pairs = []
j = 0 # counter
for x y in zip(training_data[0] training_data[1]):
expanded_training_pairs.append((x y))
image = np.reshape(x (-1 28))
j += 1
if j % 1000 == 0: print(“Expanding image number“ j)
# iterate over data telling us the details of how to
# do the displacement
for d axis index_position index in [
(1 0 “first“ 0)
(-1 0 “first“ 27)
(1 1 “last“ 0)
(-1 1 “last“ 27)]:
new_img = np.roll(image d axis)
if index_position == “first“:
new_img[index :] = np.zeros(28)
else:
new_img[: index] = np.zeros(28)
expanded_training_pairs.append((np.reshape(new_img 784) y))
random.shuffle(expanded_training_pairs)
expanded_training_data = [list(d) for d in zip(*expanded_training_pairs)]
print(“Saving expanded data. This may take a few minutes.“)
f = gzip.open(“../data/mnist_expanded.pkl.gz“ “w“)
cPickle.dump((expanded_training_data validation_data test_data) f)
f.close()
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
目录 0 2018-04-19 05:36 DeepLearningPython35-master
文件 12 2018-04-19 05:36 DeepLearningPython35-master.gitignore
文件 492526 2018-04-19 05:36 DeepLearningPython35-masterMyNetwork
文件 619 2018-04-19 05:36 DeepLearningPython35-masterREADME.md
文件 1982 2018-04-19 05:36 DeepLearningPython35-masterexpand_mnist.py
文件 17051982 2018-04-19 05:36 DeepLearningPython35-mastermnist.pkl.gz
文件 2673 2018-04-19 05:36 DeepLearningPython35-mastermnist_average_darkness.py
文件 3425 2018-04-19 05:36 DeepLearningPython35-mastermnist_loader.py
文件 770 2018-04-19 05:36 DeepLearningPython35-mastermnist_svm.py
文件 6399 2018-04-19 05:36 DeepLearningPython35-master
etwork.py
文件 15252 2018-04-19 05:36 DeepLearningPython35-master
etwork2.py
文件 13000 2018-04-19 05:36 DeepLearningPython35-master
etwork3.py
文件 7394 2018-04-19 05:36 DeepLearningPython35-master est.py
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