The natural logarithm of the sum of the elementwise exponential, \(\log\sum_{i=1}^n e^{x_i}\).
log_sum_exp(x, axis = NA_real_, keepdims = FALSE)
An Expression, vector, or matrix.
(Optional) The dimension across which to apply the function: 1
indicates rows, 2
indicates columns, and NA
indicates rows and columns. The default is NA
.
(Optional) Should dimensions be maintained when applying the atom along an axis? If FALSE
, result will be collapsed into an \(n x 1\) column vector. The default is FALSE
.
An Expression representing the log-sum-exponential of the input.