R: Apply cumsum to each column of matrix

colCumSum {MESS} | R Documentation

## Apply cumsum to each column of matrix

### Description

Fast computation of apply(m, 2, cumsum)

### Usage

    colCumSum(m)

### Arguments

`m` | A matrix

### Value

A matrix the same size as m with the column-wise cumulative sums.

### Author(s)

Claus Ekstrom <claus@rprimer.dk>

### Examples

      # Generate a 100 by 10000 matrix
      x <- matrix(rnorm(100*10000), nrow=100)
      result <- colCumSum(x)

[Package MESS version 0.5.9 Index]