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ZeroPad1d#

class torch.nn.ZeroPad1d(padding)[source]#

用零填充输入张量边界。

有关 N 维填充,请使用 torch.nn.functional.pad()

参数

padding (int, tuple) – 填充的大小。如果为 int,则在两个边界使用相同的填充。如果为 2-tuple,则使用 (padding_left\text{padding\_left}, padding_right\text{padding\_right})

形状
  • 输入:(C,Win)(C, W_{in})(N,C,Win)(N, C, W_{in})

  • 输出:(C,Wout)(C, W_{out})(N,C,Wout)(N, C, W_{out}),其中

    Wout=Win+padding_left+padding_rightW_{out} = W_{in} + \text{padding\_left} + \text{padding\_right}

示例

>>> m = nn.ZeroPad1d(2)
>>> input = torch.randn(1, 2, 4)
>>> input
tensor([[[-1.0491, -0.7152, -0.0749,  0.8530],
         [-1.3287,  1.8966,  0.1466, -0.2771]]])
>>> m(input)
tensor([[[ 0.0000,  0.0000, -1.0491, -0.7152, -0.0749,  0.8530,  0.0000,
           0.0000],
         [ 0.0000,  0.0000, -1.3287,  1.8966,  0.1466, -0.2771,  0.0000,
           0.0000]]])
>>> m = nn.ZeroPad1d(2)
>>> input = torch.randn(1, 2, 3)
>>> input
tensor([[[ 1.6616,  1.4523, -1.1255],
         [-3.6372,  0.1182, -1.8652]]])
>>> m(input)
tensor([[[ 0.0000,  0.0000,  1.6616,  1.4523, -1.1255,  0.0000,  0.0000],
         [ 0.0000,  0.0000, -3.6372,  0.1182, -1.8652,  0.0000,  0.0000]]])
>>> # using different paddings for different sides
>>> m = nn.ZeroPad1d((3, 1))
>>> m(input)
tensor([[[ 0.0000,  0.0000,  0.0000,  1.6616,  1.4523, -1.1255,  0.0000],
         [ 0.0000,  0.0000,  0.0000, -3.6372,  0.1182, -1.8652,  0.0000]]])