colLogSumExps,xgCMatrix-method {sparseMatrixStats} | R Documentation |
Accurately calculates the logarithm of the sum of exponentials for each row (column) of a matrix-like object.
## S4 method for signature 'xgCMatrix' colLogSumExps(lx, rows = NULL, cols = NULL, na.rm = FALSE) ## S4 method for signature 'xgCMatrix' rowLogSumExps(lx, rows = NULL, cols = NULL, na.rm = FALSE)
lx |
An NxK matrix-like object. Typically |
rows |
A |
cols |
A |
na.rm |
The S4 methods for x
of type matrix
,
array
, or numeric
call
matrixStats::rowLogSumExps
/ matrixStats::colLogSumExps
.
Returns a numeric
vector
of length N (K).
matrixStats::rowLogSumExps()
and
matrixStats::colLogSumExps()
which are used when the input is a matrix
or numeric
vector.
mat <- matrix(rnorm(15), nrow = 5, ncol = 3) mat[2, 1] <- NA mat[3, 3] <- Inf mat[4, 1] <- 0 print(mat) rowLogSumExps(mat) colLogSumExps(mat)