randn_like

Documentation

treetensor.torch.randn_like(input, *args, **kwargs)

In treetensor, you can use randn_like to create a tree of tensors with numbers obey standard normal distribution like another tree.

Example:

>>> import torch
>>> import treetensor.torch as ttorch
>>> ttorch.randn_like(torch.ones(2, 3))  # the same as torch.randn_like(torch.ones(2, 3))
tensor([[ 1.8436,  0.2601,  0.9687],
        [ 1.6430, -0.1765, -1.1732]])

>>> ttorch.randn_like({
...     'a': torch.ones(2, 3),
...     'b': {'x': torch.ones(4, )},
... })
<Tensor 0x7ff3d6f3cb38>
├── a --> tensor([[-0.1532,  1.3965, -1.2956],
│                 [-0.0750,  0.6475,  1.1421]])
└── b --> <Tensor 0x7ff3d6f420b8>
    └── x --> tensor([ 0.1730,  1.6085,  0.6487, -1.1022])

Torch Version Related

This documentation is based on torch.randn_like in torch v2.4.1+cu121. Its arguments’ arrangements depend on the version of pytorch you installed.

If some arguments listed here are not working properly, please check your pytorch’s version with the following command and find its documentation.

python -c 'import torch;print(torch.__version__)'

The arguments and keyword arguments supported in torch v2.4.1+cu121 is listed below.

Description From Torch v2.4.1+cu121

torch.randn_like(input, *, dtype=None, layout=None, device=None, requires_grad=False, memory_format=torch.preserve_format) → Tensor

Returns a tensor with the same size as input that is filled with random numbers from a normal distribution with mean 0 and variance 1. torch.randn_like(input) is equivalent to torch.randn(input.size(), dtype=input.dtype, layout=input.layout, device=input.device).

Args:

input (Tensor): the size of input will determine size of the output tensor.

Keyword args:

dtype (torch.dtype, optional): the desired data type of returned Tensor.

Default: if None, defaults to the dtype of input.

layout (torch.layout, optional): the desired layout of returned tensor.

Default: if None, defaults to the layout of input.

device (torch.device, optional): the desired device of returned tensor.

Default: if None, defaults to the device of input.

requires_grad (bool, optional): If autograd should record operations on the

returned tensor. Default: False.

memory_format (torch.memory_format, optional): the desired memory format of

returned Tensor. Default: torch.preserve_format.