[BioC] Is there anyway I can write out data similar to reading them using read.maimages?

[Gordon K Smyth]

Dear Ruppert,

There is no function like "write.maimages" because there's no need for it. 
limma reads only the columns it needs, which means that it reads Agilent 
files with many columns nearly as quickly as ones with just a few columns.

Besides, I don't like to alter raw data files, just on principle.  It is 
the number 1 way to introduce difficult to trace errors.

Best wishes
Gordon


> Date: Mon, 2 Nov 2009 13:41:38 +0000
> From: Ruppert Valentino <ruppert7 at hotmail.com>
> Subject: [BioC] Is there anyway I can write out data similar to
> 	reading them using read.maimages?
> To: BioC <bioconductor at stat.math.ethz.ch>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
>
> Hello,
>
> I have big agilent files to deal with and want to know if there is a way 
> to collapse them by reading them and writing out the maimages but with 
> the fields I am after.
>
> The script I used to read them are as follows :
>
>
> targets <- readTargets("TargetsTest.txt",sep="\t")
>
> RG <- read.maimages(targets$FileName, source = "agilent", 
> names=targets$Description, columns= list(R = "rProcessedSignal", G = 
> "gProcessedSignal", Rb = "rBGUsed", Gb = "gBGUsed"), annotation = 
> c("FeatureNum","Row","Col","ProbeName","ControlType","GeneName","Description","SystematicName"))
>
>
> there is no function called write.maimages but is there something 
> similar that would take the RG attributes and write them out so they can 
> be read later using read.maimages?
>
>
> thanks