torch.signbit — PyTorch 2.5 documentation (original) (raw)

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torch.signbit(input, *, out=None) → Tensor¶

Tests if each element of input has its sign bit set or not.

Parameters

input (Tensor) – the input tensor.

Keyword Arguments

out (Tensor, optional) – the output tensor.

Example:

a = torch.tensor([0.7, -1.2, 0., 2.3]) torch.signbit(a) tensor([ False, True, False, False]) a = torch.tensor([-0.0, 0.0]) torch.signbit(a) tensor([ True, False])

Note

signbit handles signed zeros, so negative zero (-0) returns True.

• torch.signbit
  • signbit()