torch.atleast_3d

torch.atleast_3d(*tensors)

返回每个输入张量的 3 维视图，其维度为零。具有三个或更多维度的输入张量将按原样返回。

参数

input (Tensor 或 Tensor 序列) – 要转换为至少 3 维的张量。

返回

output (Tensor or tuple of Tensors)

示例

>>> x = torch.tensor(0.5)
>>> x
tensor(0.5000)
>>> torch.atleast_3d(x)
tensor([[[0.5000]]])
>>> y = torch.arange(4).view(2, 2)
>>> y
tensor([[0, 1],
        [2, 3]])
>>> torch.atleast_3d(y)
tensor([[[0],
         [1]],

        [[2],
         [3]]])
>>> x = torch.tensor(1).view(1, 1, 1)
>>> x
tensor([[[1]]])
>>> torch.atleast_3d(x)
tensor([[[1]]])
>>> x = torch.tensor(0.5)
>>> y = torch.tensor(1.0)
>>> torch.atleast_3d((x, y))
(tensor([[[0.5000]]]), tensor([[[1.]]]))
>>> torch.atleast_3d()
()