uniform_random_batch_size_like¶

paddle.fluid.layers.nn. uniform_random_batch_size_like ( input, shape, dtype='float32', input_dim_idx=0, output_dim_idx=0, min=- 1.0, max=1.0, seed=0 ) [source]

This OP initializes a variable with random values sampled from a uniform distribution in the range [min, max). The input_dim_idx used to get the input dimension value which will be used to resize the output dimension.

 *Case 1:

     Given:
         input =[[0.946741  , 0.1357001 , 0.38086128]]    # input.shape=[1,3]
         shape=[2,4]

     result.shape[output_dim_idx] = input.shape[input_dim_idx],
     output_dim_idx = 0,
     input_dim_idx = 0,
     result.shape[0] = input.shape[0],
     then:
         result=[[ 0.3443427 , -0.23056602,  0.3477049 ,  0.06139076]]    # result.shape=[1,4]

*Case 2:

    Given:
        input =[[0.946741  , 0.1357001 , 0.38086128]]     # input.shape=[1,3]
        shape=[2,4]
        input_dim_idx=1
        output_dim_idx=1

    result.shape[output_dim_idx] = input.shape[input_dim_idx],
    output_dim_idx = 1,
    input_dim_idx = 1,
    result.shape[1] = input.shape[1],
    then:
        result=[[-0.23133647, -0.84195036,  0.21441269],
                [-0.08774924,  0.25605237, -0.09403259]]    # result.shape=[2,3]

System Message: WARNING/2 (/usr/local/lib/python3.8/site-packages/paddle/fluid/layers/nn.py:docstring of paddle.fluid.layers.nn.uniform_random_batch_size_like, line 34)

Explicit markup ends without a blank line; unexpected unindent.

Parameters

• input (Variable) – A Tensor. Supported data types: float32, float64.

• shape (tuple|list) – A python list or python tuple. The shape of the output Tensor, the data type is int.

• input_dim_idx (int, optional) – An index used to get the input dimension value which will be used to resize the output dimension. Default 0.

• output_dim_idx (int, optional) – An index used to indicate the specific dimension that will be replaced by corresponding input dimension value. Default 0.

• min (float, optional) – The lower bound on the range of random values to generate, the min is included in the range. Default -1.0.

• max (float, optional) – The upper bound on the range of random values to generate, the max is excluded in the range. Default 1.0.

• seed (int, optional) – Random seed used for generating samples. 0 means use a seed generated by the system.Note that if seed is not 0, this operator will always generate the same random numbers every time.

• dtype (np.dtype|core.VarDesc.VarType|str, optional) – The data type of output Tensor. Supported data types: float32, float64. Default float32.

Returns

A Tensor of the specified shape filled with uniform_random values. The shape of the Tensor is determined by the shape parameter and the specified dimension of the input Tensor.

Return type

Variable

Examples

import paddle
import paddle.fluid as fluid
paddle.enable_static()

# example 1:
input = fluid.data(name="input", shape=[1, 3], dtype='float32')
out_1 = fluid.layers.uniform_random_batch_size_like(input, [2, 4]) # out_1.shape=[1, 4]

# example 2:
out_2 = fluid.layers.uniform_random_batch_size_like(input, [2, 4], input_dim_idx=1, output_dim_idx=1) # out_2.shape=[2, 3]