[R] Usefulness of "scale" function

From: Gundala Viswanath <gundalav_at_gmail.com>
Date: Sat, 07 Jun 2008 23:41:04 +0900


Hi all,

I found this snippet in a gene expression clustering code.

__BEGIN__

temp <- readLines("GSE1110_series_matrix.txt"); cat(temp[-grep("^!|^\"$", temp)], file="GSE1110clean.txt", sep="\n"); mydata <- read.delim("GSE1110clean.txt", header=T, sep="\t")

mydatascale <- t(scale(t(mydata)))

I am wondering, in general:

  1. What is the purpose of 'scale' function?
  2. When one should use it?
-- 
Gundala Viswanath


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Received on Sat 07 Jun 2008 - 14:54:15 GMT

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