Utility to median normalize a matrix by columns

Description

Divide appropriately to make all column medians equal to the max median

Usage

medianNorm(mat)

Arguments

Value

Matrix of same dimensions.

Examples

mat = 100+matrix(rnorm(1000), ncol=10)
mat[,10] = mat[,10] + 2
layout(matrix(1:2, nrow=1))
boxplot(mat)
boxplot(medianNorm(mat))

# note: issues when medians close to 0.

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

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> library(SwathXtend)
Loading required package: e1071
Loading required package: openxlsx
Loading required package: VennDiagram
Loading required package: grid
Loading required package: futile.logger
Loading required package: lattice
> png(filename="/home/ddbj/snapshot/RGM3/R_BC/result/SwathXtend/medianNorm.Rd_%03d_medium.png", width=480, height=480)
> ### Name: medianNorm
> ### Title: Utility to median normalize a matrix by columns
> ### Aliases: medianNorm
> ### Keywords: ~kwd1 ~kwd2
> 
> ### ** Examples
> 
> mat = 100+matrix(rnorm(1000), ncol=10)
> mat[,10] = mat[,10] + 2
> layout(matrix(1:2, nrow=1))
> boxplot(mat)
> boxplot(medianNorm(mat))
> 
> # note: issues when medians close to 0.
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>