如何连接 Tensorflow 数据集列？

问题描述

我有一个 Keras 模型，它采用形状为 (n,288,1) 的输入层，其中 288 是特征数。我正在使用 TensorFlow 数据集 tf.data.experimental.make_batched_features_dataset 并且我的输入层将是 (n,1,1) 这意味着它一次为模型提供一个特征。如何制作形状为 (n,1) 的输入张量？我的意思是如何在一个张量中使用我的所有功能？ 这是我的模型代码：

def _gzip_reader_fn(filenames):
"""Small utility returning a record reader that can read gzip'ed files."""
return tf.data.TFRecordDataset(filenames,compression_type='GZIP')


def _input_fn(file_pattern,tf_transform_output,batch_size):
"""Generates features and label for tuning/training.

Args:
    file_pattern: input tfrecord file pattern.
    tf_transform_output: A TFTransformOutput.
    batch_size: representing the number of consecutive elements of returned
    dataset to combine in a single batch

Returns:
    A dataset that contains (features,indices) tuple where features is a
     dictionary of Tensors,and indices is a single Tensor of label indices.
 """

transformed_feature_spec = (
    tf_transform_output.transformed_feature_spec().copy())

dataset = tf.data.experimental.make_batched_features_dataset(
    file_pattern=file_pattern,batch_size=batch_size,features=transformed_feature_spec,reader=_gzip_reader_fn,label_key=features.transformed_name(features.LABEL_KEY))

return dataset

def _build_keras_model(nb_classes=2,input_shape,learning_rate):

# Keras needs the feature definitions at compile time.
input_shape = (288,1)
input_layer = keras.layers.Input(input_shape)

padding = 'valid'
if input_shape[0] < 60:
    padding = 'same'

conv1 = keras.layers.Conv1D(filters=6,kernel_size=7,padding=padding,activation='sigmoid')(input_layer)
conv1 = keras.layers.AveragePooling1D(pool_size=3)(conv1)
conv2 = keras.layers.Conv1D(filters=12,activation='sigmoid')(conv1)
conv2 = keras.layers.AveragePooling1D(pool_size=3)(conv2)

flatten_layer = keras.layers.Flatten()(conv2)
output_layer = keras.layers.Dense(units=nb_classes,activation='sigmoid')(flatten_layer)

model = keras.models.Model(inputs=input_layer,outputs=output_layer)

optimizer = keras.optimizers.Adam(lr=learning_rate)

# Compile Keras model
model.compile(loss='mean_squared_error',optimizer=optimizer,metrics=['accuracy'])
model.summary(print_fn=logging.info)

return model

这是错误：

tensorflow:Model was constructed with shape (None,1) for input Tensor("input_1:0",shape=(None,1),dtype=float32),but it was called on an input with incompatible shape (128,1).

解决方法

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