Re: [R] Quantile normalization and NA

From: Uwe Ligges <>
Date: Sun 10 Jul 2005 - 20:34:41 EST

Ravi Murthy wrote:

> Hi,
> I am new to R,
> I am doing quantile normalization with a dat matix of
> 384X124 and I find that while computing the quantile
> normailzation it introduces 'NA' into some of the
> cells, can someone help me to overcome this problem ?
> This is the command that goes like upto g62 for 124
> colomns
>>g1 <- normalize.quantiles(exprs(MSExpr[,1:2]))

Do you mean the function normalize.quantiles() from package "affy" (please always tell the package, if the function is not in base R)? It's more appropriate to ask on the Bioconductor mailing list if Bioconductor packages are the subject of interest.

And you might want to give a simple, reproducible, but non-bandwith-wasting example (perhaps by uploadiung data to some web site) in order to make the Bioconductor folks able help you.

Uwe Ligges

> For a small set of data there is no problem, but for a
> large set of data, it introduces "NA" in the place
> where it is suppose to geneerate data .
> Ravi
> Raviabi
> ______________________________________________
> mailing list
> PLEASE do read the posting guide! mailing list PLEASE do read the posting guide! Received on Sun Jul 10 20:35:45 2005

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