I tried reinstalling via biocLite("affyPLM"), and I still get the same 
error.  Here is the information from traceback():
> traceback()
4: stop("argument must be matrix-like")
3: image.default(Pset1, which = 2)
2: image(Pset1, which = 2)
1: image(Pset1, which = 2)

Is there a cleaner way to reinstall a package rather than simply running 
biocLite?  If so, I will try that.

To address Greg's email as well, I have no problems with any of the 
release versions of R/Bioconductor (R2.3 (Linux) & R2.4 (Windows)) just 
with the development version.

Steve
Rm B311-D,  Ph#: 919-541-0514






"James W. MacDonald" <jmacdon@med.umich.edu> 
03/13/2007 11:42 AM

To
Stephen Edwards/RTP/USEPA/US@EPA
cc
bioconductor@stat.math.ethz.ch
Subject
Re: [BioC] PLMset and image function






Hi Stephen,

Edwards.Stephen@epamail.epa.gov wrote:
> This may be a known issue, but I'm trying to use the image function with 

> PLMset objects in R2.5 and get the following error:  argument must be 
> matrix-like.
> 
> 
>>data(Dilution)
>>Pset1 <- fitPLM(Dilution)
>>image(Pset1, type = "weights", which = 3)
> 
> Error in image.default(Pset1, type = "weights", which = 3) : 
>         argument must be matrix-like

I can get this to work on both win32 and 64 bit linux with this version 
of affyPLM. You might try re-installing affyPLM. Another useful bit of 
info would be a traceback() after the error (if a re-install doesn't 
help).

Best,

Jim


-- 
James W. MacDonald, M.S.
Biostatistician
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109
734-647-5623


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