torch.nonzero

2022-09-03 19:14:09 浏览数 (2)

代码语言:javascript复制
import torch
a=torch.randint(-1,2,(10,),dtype=torch.int)
print(a)
print(a.size())
print(torch.nonzero(a))
print(torch.nonzero(a).size())



Output:
-------------------------------------------------------------------------
    tensor([ 0, -1,  1,  1, -1,  0,  1, -1, -1, -1], dtype=torch.int32)
    torch.Size([10])
    tensor([[1],
            [2],
            [3],
            [4],
            [6],
            [7],
            [8],
            [9]])
    torch.Size([8, 1])
-------------------------------------------------------------------------

也就是说torch.nonezero()的作用就是找到tensor中所有不为0的索引。(要注意返回值的size)

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