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rowSums2

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

Description

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

Usage

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

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

Arguments

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, NAs are excluded first, otherwise not.
dim.

An integer vector of length two specifying the dimension of x, also when not a matrix.
...

Not used.

Details

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

Value

Returns a numeric vector of length N (K).

Author(s)

Henrik Bengtsson

matrixStats

Functions that Apply to Rows and Columns of Matrices (and to Vectors)

v0.58.0
Artistic-2.0
Authors
Henrik Bengtsson [aut, cre, cph], Constantin Ahlmann-Eltze [ctb], Hector Corrada Bravo [ctb], Robert Gentleman [ctb], Jan Gleixner [ctb], Peter Hickey [ctb], Ola Hossjer [ctb], Harris Jaffee [ctb], Dongcan Jiang [ctb], Peter Langfelder [ctb], Brian Montgomery [ctb], Hugh Parsonage [ctb]
Initial release

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