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全局平均池化1D层

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GlobalAveragePooling1D class

tf_keras.layers.GlobalAveragePooling1D(data_format="channels_last", **kwargs)

Global average pooling operation for temporal data.

Examples

>>> input_shape = (2, 3, 4)
>>> x = tf.random.normal(input_shape)
>>> y = tf.keras.layers.GlobalAveragePooling1D()(x)
>>> print(y.shape)
(2, 4)

Arguments

  • data_format: A string, one of channels_last (default) or channels_first. The ordering of the dimensions in the inputs. channels_last corresponds to inputs with shape (batch, steps, features) while channels_first corresponds to inputs with shape (batch, features, steps).
  • keepdims: A boolean, whether to keep the temporal dimension or not. If keepdims is False (default), the rank of the tensor is reduced for spatial dimensions. If keepdims is True, the temporal dimension are retained with length 1. The behavior is the same as for tf.reduce_mean or np.mean.

Call arguments

  • inputs: A 3D tensor.
  • mask: Binary tensor of shape (batch_size, steps) indicating whether a given step should be masked (excluded from the average).

Input shape

  • If data_format='channels_last': 3D tensor with shape: (batch_size, steps, features)
  • If data_format='channels_first': 3D tensor with shape: (batch_size, features, steps)

Output shape

  • If keepdims=False: 2D tensor with shape (batch_size, features).
  • If keepdims=True:
    • If data_format='channels_last': 3D tensor with shape (batch_size, 1, features)
    • If data_format='channels_first': 3D tensor with shape (batch_size, features, 1)
全局平均池化1D层
GlobalAveragePooling1D class