R: Column and row-wise sums of a matrix

Column and row-wise sums of a matrix {Rfast} | R Documentation

## Column and row-wise sums of a matrix

### Description

Column and row-wise sums of a matrix.

### Usage

    colsums(x,indices = NULL, parallel = FALSE, na.rm = FALSE)

    rowsums(x,indices = NULL, parallel = FALSE, na.rm = FALSE)

### Arguments

`x` | A numerical matrix with data.
`indices` | An integer vector with the indices to sum the columns/rows.
`parallel` | Do you want to do it in parallel in C++? TRUE or FALSE. Doens't work with argument "indices".
`na.rm` | A logical value indicating to remove NAs. The algorithm run in parallel so do not use with option parallel.

### Value

A vector with sums.

### Author(s)

Manos Papadakis

R implementation and documentation: Manos Papadakis <papadakm95@gmail.com>.

### See Also

`colMedians, colmeans, colVars`

### Examples

    x <- matrix(rpois(500 * 100, 10),ncol = 100)
    x1 <- colsums(x)
    x2 <- colSums(x)
    all.equal(x1,x2)

    x1 <- rowsums(x)
    x2 <- rowSums(x)
    all.equal(x1,x2)

    x<-x1<-x2<-NULL

[Package Rfast version 2.0.4 Index]