reduce_all(input, dim=None, keep_dim=False, name=None)
This OP computes the
logical andof tensor elements over the given dimension, and output the result.
input (Variable) – The input variable which is a Tensor or LoDTensor, the input data type should be bool.
dim (list|int|optional) – The dimension along which the logical and is computed. If
None, compute the logical and over all elements of
inputand return a Tensor variable with a single element, otherwise must be in the range \([-rank(input), rank(input))\). If \(dim[i] < 0\), the dimension to reduce is \(rank + dim[i]\). The default value is None.
keep_dim (bool) – Whether to reserve the reduced dimension in the output Tensor. The result tensor will have one fewer dimension than the
keep_dimis true. The default value is False.
name (str|None) – A name for this layer(optional). If set None, the layer will be named automatically. The default value is None.
The reduced tensor variable with
logical andin given dims.
- Return type
Variable, the output data type is bool.
import paddle.fluid as fluid import paddle.fluid.layers as layers import numpy as np # x is a bool Tensor variable with following elements: # [[True, False] # [True, True]] x = layers.assign(np.array([[1, 0], [1, 1]], dtype='int32')) x = layers.cast(x, 'bool') out = layers.reduce_all(x) # False out = layers.reduce_all(x, dim=0) # [True, False] out = layers.reduce_all(x, dim=-1) # [False, True] # keep_dim=False, x.shape=(2,2), out.shape=(2,) out = layers.reduce_all(x, dim=1, keep_dim=True) # [[False], [True]] # keep_dim=True, x.shape=(2,2), out.shape=(2,1)