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riskRegression (version 2022.09.23)

colCumSum: Apply cumsum in each column

Description

Fast computation of apply(x,2,cumsum)

Usage

colCumSum(x)

Value

A matrix of same size as x.

Arguments

x

A matrix.

Author

Thomas Alexander Gerds <tag@biostat.ku.dk>

Examples

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

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