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torch.lgamma

torch.lgamma(input, *, out=None) Tensor

Computes the natural logarithm of the absolute value of the gamma function on input.

outi=lnΓ(inputi)\text{out}_{i} = \ln \Gamma(|\text{input}_{i}|)
Parameters

input (Tensor) – the input tensor.

Keyword Arguments

out (Tensor, optional) – the output tensor.

Example:

>>> a = torch.arange(0.5, 2, 0.5)
>>> torch.lgamma(a)
tensor([ 0.5724,  0.0000, -0.1208])

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