標題介紹運行環境了win7
看網上好多keras識別minist 但是一般由於版本問題，無法直接用，，，這里還要特別感謝keras中文文檔作者（三當家SCP）。教程整的非常好。還有就是最好你在安裝anaconda 之前把原來安裝過的PY卸載掉，要不然安裝mingw的時候會出問題，，，安裝就不詳細介紹了網上有很多種----大致流程——anaconda-mingw-theano(注意環境變量，系統變量啥的)-keras。
下邊附上一個可用程序哈，親測可用。。。並附上數據，數據來源於網絡，見文章底部，你就不用運行的時候在下載數據，這樣很容易出錯的。非GPU環境 win7 64bit
好的：其實重點是新的語法的問題。。。。。。。。。。。。。。。。。。。更新地方已標紅。。。。。。。
1 from __future__ import absolute_import 2 from __future__ import print_function 3 import numpy as np 4 np.random.seed(1337) # for reproducibility 5 import cPickle as pickle 6 7 from keras.models import Sequential 8 from keras.layers.core import Dense, Dropout, Activation 9 from keras.optimizers import SGD, Adam, RMSprop 10 from keras.utils import np_utils 11 12 ''' 13 Train a simple deep NN on the MNIST dataset. 14 Get to 98.30% test accuracy after 20 epochs (there is *a lot* of margin for parameter tuning). 15 2 seconds per epoch on a GRID K520 GPU. 16 ''' 17 18 batch_size = 128 19 nb_classes = 10 20 nb_epoch = 10 21 22 23 def read_data(data_file): 24 import gzip 25 f = gzip.open(data_file, "rb") 26 train, val, test = pickle.load(f) 27 f.close() 28 train_x = train[0] 29 train_y = train[1] 30 test_x = test[0] 31 test_y = test[1] 32 return train_x, train_y, test_x, test_y 33 34 35 # the data, shuffled and split between tran and test sets 36 #(X_train, y_train), (X_test, y_test) = mnist.load_data() 37 train_x, train_y, test_x, test_y = read_data("C:\Users\PC\.spyder2\mnist.pkl.gz") 38 X_train = train_x 39 X_test = test_x 40 X_train = X_train.astype("float32") 41 X_test = X_test.astype("float32") 42 X_train /= 255 43 X_test /= 255 44 print(X_train.shape[0], 'train samples') 45 print(X_test.shape[0], 'test samples') 46 47 # convert class vectors to binary class matrices 48 Y_train = np_utils.to_categorical(train_y, nb_classes) 49 Y_test = np_utils.to_categorical(test_y, nb_classes) 50 51 model = Sequential() 52 model.add(Dense(input_dim=784, output_dim=128)) 53 model.add(Activation('relu')) 54 model.add(Dropout(0.2)) 55 model.add(Dense(output_dim=128)) 56 model.add(Activation('relu')) 57 model.add(Dropout(0.2)) 58 model.add(Dense(output_dim=10)) 59 model.add(Activation('softmax')) 60 61 rms = RMSprop() 62 model.compile(loss='categorical_crossentropy', optimizer=rms,metrics=['accuracy']) 63 64 model.fit(X_train, Y_train, batch_size=batch_size, nb_epoch=nb_epoch) 65 score = model.evaluate(X_test, Y_test, batch_size=batch_size) 66 print('Test score:', score[0]) 67 print('Test accuracy:', score[1])
數據在這里：http://www.cnblogs.com/xueliangliu/archive/2013/04/03/2997437.html。。。由於沒法上傳有15兆，我看這個大牛有這個數據，而且還附帶了安裝及原理等，自己看吧。。。。。。。