Softmin

class torch.nn.Softmin(dim=None) [source]

Applies the Softmin function to an n-dimensional input Tensor rescaling them so that the elements of the n-dimensional output Tensor lie in the range [0, 1] and sum to 1.

Softmin is defined as:

$$\text{Softmin}(x_{i}) = \frac{\exp(-x_i)}{\sum_j \exp(-x_j)}$$

Shape:

• Input: $(*)$ where * means, any number of additional dimensions
• Output: $(*)$, same shape as the input

Parameters:

dim (int) – A dimension along which Softmin will be computed (so every slice along dim will sum to 1).

Returns:

a Tensor of the same dimension and shape as the input, with values in the range [0, 1]

Return type:

None

Examples:

>>> m = nn.Softmin(dim=1)
>>> input = torch.randn(2, 3)
>>> output = m(input)