我从 Keras 站点植入了 10 分钟的 LSTM 示例,并调整网络以处理词嵌入而不是字符嵌入(来自https://blog.keras.io/a-ten-minute-introduction-to-sequence-to-序列学习在 keras.html 中)。它工作得很好。
但是现在我很难使用 GRU 而不是 LSTM。调整变量后,编译和训练(拟合函数)起作用了。但是当我尝试使用网络通过自定义输入对其进行测试时,它会抛出:
尺寸必须相等,但输入形状为 [1,?,?,232], [?,256] 的“添加”(操作:“添加”)为 232 和 256
LSTM 的相关工作代码是:
encoder_inputs = Input(shape=(None, num_encoder_tokens), name="Encoder_Input")
encoder = LSTM(latent_dim, return_state=True, name="Encoder_LSTM")
encoder_outputs, state_h, state_c = encoder(encoder_inputs)
encoder_states = [state_h, state_c]
decoder_inputs = Input(shape=(None, num_decoder_tokens), name="Decoder_Input")
decoder_lstm = LSTM(latent_dim, return_sequences=True, return_state=True, name="Decoder_LSTM")
decoder_outputs, _, _ = decoder_lstm(decoder_inputs,
initial_state=encoder_states)
decoder_dense = Dense(num_decoder_tokens, activation='softmax', name="DecoderOutput")
decoder_outputs = decoder_dense(decoder_outputs)
model = Model([encoder_inputs, decoder_inputs], decoder_outputs)
model.compile(optimizer='rmsprop', loss='categorical_crossentropy', metrics=['accuracy'])
model.summary()
result = model.fit([encoder_input_data, decoder_input_data], decoder_target_data,
batch_size=batch_size,
epochs=epochs,
validation_split=0.2)
encoder_model = Model(encoder_inputs, encoder_states)
decoder_state_input_h = Input(shape=(latent_dim,))
decoder_state_input_c = Input(shape=(latent_dim,))
decoder_states_inputs = [decoder_state_input_h, decoder_state_input_c]
decoder_outputs, state_h, state_c = decoder_lstm(
decoder_inputs, initial_state=decoder_states_inputs)
decoder_states = [state_h, state_c]
decoder_outputs = decoder_dense(decoder_outputs)
decoder_model = Model(
[decoder_inputs] + decoder_states_inputs,
[decoder_outputs] + decoder_states)
reverse_target_word_index = dict(
(i, word) for word, i in target_token_index.items())
GRU代码是:
encoder_inputs = Input(shape=(None, num_encoder_tokens), name="Encoder_Input")
encoder = GRU(latent_dim, return_state=True, name="Encoder_GRU")
_, encoder_state = encoder(encoder_inputs)
decoder_inputs = Input(shape=(None, num_decoder_tokens), name="Decoder_Input")
decoder_gru = GRU(latent_dim, return_sequences=True, return_state=True, name="Decoder_GRU")
decoder_outputs, _ = decoder_gru(decoder_inputs, initial_state=encoder_state)
decoder_dense = Dense(num_decoder_tokens, activation='softmax', name="DecoderOutput")
decoder_outputs = decoder_dense(decoder_outputs)
model = Model([encoder_inputs, decoder_inputs], decoder_outputs)
model.compile(optimizer='rmsprop', loss='categorical_crossentropy', metrics=['accuracy'])
model.summary()
result = model.fit([encoder_input_data, decoder_input_data], decoder_target_data,
batch_size=batch_size,
epochs=epochs,
validation_split=0.2)
encoder_model = Model(encoder_inputs, encoder_state)
decoder_states_inputs = Input(shape=(latent_dim,))
decoder_outputs, decoder_states = decoder_gru(
decoder_inputs, initial_state=decoder_states_inputs)
decoder_outputs = decoder_dense(decoder_outputs)
decoder_model = Model(
[decoder_inputs] + decoder_states_inputs,
[decoder_outputs] + decoder_states) # This is where the error appears
reverse_input_word_index = dict(
(i, word) for word, i in input_token_index.items())
reverse_target_word_index = dict(
(i, word) for word, i in target_token_index.items())
我用“#这是错误出现的地方”标记了错误的发生。
感谢您提供的任何帮助,是的,我需要尝试这两个系统来比较它们与给定数据集的差异。