colCumSum {riskRegression}

Apply cumsum in each column

Description

Fast computation of apply(x,2,cumsum)

Usage

colCumSum(x)

Arguments

x

A matrix.

Value

A matrix of same size as x.

Author(s)

Thomas Alexander Gerds <[e-mail]>

Examples

x <- matrix(1:8,ncol=2)
colCumSum(x)