torch_logcumsumexp {torch}

Logcumsumexp

Description

Logcumsumexp

Usage

torch_logcumsumexp(self, dim)

Arguments

self

(Tensor) the input tensor.

dim

(int) the dimension to do the operation over

logcumsumexp(input, dim, *, out=None) -> Tensor

Returns the logarithm of the cumulative summation of the exponentiation of elements of input in the dimension dim.

For summation index j given by dim and other indices i, the result is

\mbox{logcumsumexp}(x)_{ij} = \log \sum\limits_{j=0}^{i} \exp(x_{ij})

Examples

if (torch_is_installed()) {

a <- torch_randn(c(10))
torch_logcumsumexp(a, dim=1)
}