[BioC] expresso error

[Vincent Carey]

please provide your sessionInfo() and the specific class of array in
use -- there are various mouse
expression arrays from affy.

On Wed, Oct 6, 2010 at 9:17 PM, ANJAN PURKAYASTHA
<anjan.purkayastha at gmail.com> wrote:
> Hi,
> I have created an affybatch object from 3 cel files. The files have data
> from Affymetrix's Mouse Expression (Oligonucleotide) array.
> Affybatch object was created by command:
> testAffy <- ReadAffy()
>
> In the next step I tried to use expresso to adjust background using RMA and
> normalize using loess, using the command:
> testAffy.loess = expresso(testAffy, bgcorrect.method= "rma",
> normalize.method= "loess")
> Here is the output:
> background correction: rma
> normalization: loess
> PM/MM correction :
> expression values:
> background correcting...done.
> normalizing...Done with 1 vs 2 in iteration 1
> Done with 1 vs 3 in iteration 1
> Done with 2 vs 3 in iteration 1
> 1 0.0176947
> done.
> Error in function (classes, fdef, mtable)  :
>  unable to find an inherited method for function "computeExprSet", for
> signature "AffyBatch", "NULL", "NULL"
>
> The testAffy.loess object was not created.  Any idea why I am getting an
> error on running the expresso command?
> Thanks in advance.
> Anjan
>
> --
> ===================================
> anjan purkayastha, phd.
> research associate
> fas center for systems biology,
> harvard university
> 52 oxford street
> cambridge ma 02138
> phone-703.740.6939
> ===================================
>
>        [[alternative HTML version deleted]]
>
> _______________________________________________
> Bioconductor mailing list
> Bioconductor at stat.math.ethz.ch
> https://stat.ethz.ch/mailman/listinfo/bioconductor
> Search the archives: http://news.gmane.org/gmane.science.biology.informatics.conductor
>