R: Calculates the sum for each row (column) in a matrix

rowSums2 {matrixStats}

R Documentation

Calculates the sum for each row (column) in a matrix

Calculates the sum for each row (column) in a matrix.

rowSums2(x, rows = NULL, cols = NULL, na.rm = FALSE, dim. = dim(x), ...)

colSums2(x, rows = NULL, cols = NULL, na.rm = FALSE, dim. = dim(x), ...)

`x`	A `numeric` or a `logical` NxK `matrix`.
`rows, cols`	A `vector` indicating subset of rows (and/or columns) to operate over. If `NULL`, no subsetting is done.
`na.rm`	If `TRUE`, `NA`s are excluded first, otherwise not.
`dim.`	An `integer` `vector` of length two specifying the dimension of `x`, also when not a `matrix`.
`...`	Not used.

The implementation of rowSums2() and colSums2() is optimized for both speed and memory.

Returns a numeric vector of length N (K).

Henrik Bengtsson

[Package matrixStats version 0.54.0 Index]