嗨,我是一個初學者keras。在Keras(深度學習庫)中,RepeatVector + TimeDistributed =錯誤?
我在做一些模型。
步驟1.輸入批次和單詞列表,(BATCH_SIZE,WORD_INDEX_LIST) 步驟2.獲取字的嵌入每個字(BATCH_SIZE,WORD_LENGTH,EMBEDDING_SIZE) 步驟3.平均每個批處理中每個的每個字的嵌入。 (BATCH_SIZE,EMBEDDING_SIZE) 步驟4.重複矢量N,(BATCH_SIZE,N,EMBEDDING_SIZE) 步驟5.應用緻密層每個時間步
所以,我編寫代碼。
MAX_LEN = 20 (= WORD_INDEX_LIST)
step 1
layer_target_input = Input(shape=(MAX_LEN,), dtype="int32", name="layer_target_input")
# step2
layer_embedding = Embedding(input_dim = n_symbols+1, output_dim=vector_dim,input_length=MAX_LEN,
name="embedding", weights= [embedding_weights],trainable = False)
encoded_target = layer_embedding(layer_target_input)
# step 3
encoded_target_agg = KL.core.Lambda(lambda x: K.sum(x, axis=1))(encoded_target)
#step 4
encoded_target_agg_repeat = KL.RepeatVector(MAX_LEN)(encoded_target_agg)
# step 5
layer_annotated_tahn = KL.Dense(output_dim=50, name="layer_tahn")
layer_annotated_tahn_td = KL.TimeDistributed(layer_annotated_tahn) (encoded_target_agg_repeat)
model = KM.Model(input=[layer_target_input], output=[ layer_annotated_tahn_td])
r = model.predict({ "layer_target_input":dev_targ}) # dev_targ = (2, 20, 300)
但是,當我運行這段代碼, 結果是波紋管。
Traceback (most recent call last):
File "Main.py", line 127, in <module>
r = model.predict({ "layer_target_input":dev_targ})
File "/usr/local/anaconda/lib/python2.7/site-packages/Keras-1.0.7-py2.7.egg/keras/engine/training.py", line 1180, in predict
batch_size=batch_size, verbose=verbose)
File "/usr/local/anaconda/lib/python2.7/site-packages/Keras-1.0.7-py2.7.egg/keras/engine/training.py", line 888, in _predict_loop
outs[i][batch_start:batch_end] = batch_out
ValueError: could not broadcast input array from shape (30,20,50) into shape (2,20,50)
爲什麼批量大小發生變化? 我有什麼錯?
這是一個完美的解釋和答覆。 它可以幫助解決我的問題。 非常感謝! –