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  • PYTHON深度学习6.2RNN循环网络

    #简单的循环网络

    #-*-coding:utf-8 -*-


    from keras.datasets import imdb
    from keras.preprocessing import sequence

    max_fetaures = 10000
    maxlen = 500
    batch_size = 32
    print("Loading data...")
    (x_train, y_train), (x_test, y_test) = imdb.load_data(path="/home/duchao/projects(my)/keras/kagge/6/6.1/imdb.npz",num_words=max_fetaures)
    print(len(x_train), 'train sequences')
    print(len(x_test), 'test sequences')

    print('Pad sequences (sample x time)')
    x_train = sequence.pad_sequences(x_train, maxlen=maxlen)
    x_test = sequence.pad_sequences(x_test, maxlen=maxlen)

    print('x_train shape:', x_train.shape)
    print('x_test shape:', x_test.shape)



    from keras.layers import Dense
    from keras.models import Sequential
    from keras.layers import Embedding,SimpleRNN

    model = Sequential()
    model.add(Embedding(max_fetaures, 32))
    model.add(SimpleRNN(32))
    model.add(Dense(1, activation='sigmoid'))

    model.compile(optimizer='rmsprop', loss='binary_crossentropy', metrics=['acc'])
    history = model.fit(x_train, y_train, epochs=10, batch_size=128, validation_split=0.2)




    import matplotlib.pyplot as plt

    acc = history.history['acc']
    val_acc = history.history['val_acc']
    loss = history.history['loss']
    val_loss = history.history['val_loss']

    epochs = range(1, len(acc) + 1)

    plt.plot(epochs, acc, 'bo', label='Training acc')
    plt.plot(epochs, val_acc, 'b', label='Validation acc')
    plt.title('Training and validation accuracy')
    plt.legend()

    plt.figure()

    plt.plot(epochs, loss, 'bo', label='Training loss')
    plt.plot(epochs, val_loss, 'b', label='Validation loss')
    plt.title('Training and validation loss')
    plt.legend()

    plt.show()
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  • 原文地址:https://www.cnblogs.com/shuimuqingyang/p/10430335.html
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