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List: bioconductor
Subject: [BioC] Unable to read GPR files for LIMMA
From: Guoneng Zhong <guoneng.zhong () yale ! edu>
Date: 2005-05-25 18:00:00
Message-ID: 4294BD20.9070109 () yale ! edu
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Hi,
read.maimages seems to be fine reading five GPR (1.3) files. But when I
tried to correct for backgrond, I get this:
RG <- backgroundCorrect(RG,method='normexp')
Corrected array 1
Corrected array 2
Corrected array 3
Corrected array 4
Error in optim(c(beta, log(sigma), log(alpha)), sumloglik, gr =
grsumloglik, :
non-finite value supplied by optim
So I ignored the background and went ahead with normalization (default
one as well as loess), and did a lmFit. So far so good, but then when I
tried with eBayes, I get this warning message:
> fit<-eBayes(fit)
Warning message:
Estimation of var.prior failed - set to default value in: ebayes(fit =
fit, proportion = proportion, stdev.coef.lim = stdev.coef.lim)
So is there something wrong with the image files? if so, how do I know
what it is?
Thanks,
g
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