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- seed = 7
- numpy.random.seed(seed)
- # load data
- (X_train, y_train), (X_test, y_test) = mnist.load_data()
- # reshape to be [samples][pixels][width][height]
- X_train = X_train.reshape(X_train.shape[0], 1, 28, 28).astype('float32')
- X_test = X_test.reshape(X_test.shape[0], 1, 28, 28).astype('float32')
- # normalize inputs from 0-255 to 0-1
- X_train = X_train / 255
- X_test = X_test / 255
- # one hot encode outputs
- y_train = np_utils.to_categorical(y_train)
- y_test = np_utils.to_categorical(y_test)
- num_classes = y_test.shape[1]
- def larger_model():
- # create model
- model = Sequential()
- model.add(Convolution2D(30, 5, 5, border_mode='valid', input_shape=(1, 28, 28), activation='relu'))
- model.add(MaxPooling2D(pool_size=(2, 2)))
- model.add(Convolution2D(15, 3, 3, activation='relu'))
- model.add(MaxPooling2D(pool_size=(2, 2)))
- model.add(Dropout(0.2))
- model.add(Flatten())
- model.add(Dense(128, activation='relu'))
- model.add(Dense(50, activation='relu'))
- model.add(Dense(num_classes, activation='softmax'))
- # Compile model
- model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy'])
- return model
- # build the model
- model = larger_model()
- # Fit the model
- model.fit(X_train, y_train, validation_data=(X_test, y_test), nb_epoch=10, batch_size=200, verbose=2)
- # Final evaluation of the model
- scores = model.evaluate(X_test, y_test, verbose=0)
- print("Baseline Error: %.2f%%" % (100-scores[1]*100))`import numpy
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