Hi,

First of all: apologies if I'm missing something obvious.

I'm trying to read a set of CEL files from the ImmGen project,
(GSE15907). I'm following the document at
http://groups.google.com/group/aroma-affymetrix/web/gene-1-0-st-array-analysis
but I'm running into an error I can't interpret. Any help would be
most appreciated!

My folder structure is the following:

/Users/mike/Data/Immgen
   |-annotationData
   |---chipTypes
   |-----MoGene-1_0-st-v1    <--- in here is MoGene-1_0-st-v1,r3.cdf
   |---samples
   |-rawData
   |---GSE15907
   |-----MoGene-1_0-st-v1    <--- in here are lots of gzipped CEL
files

The code I'm using is

library('aroma.affymetrix')
setwd("/Users/mike/Data/Immgen")
cdf <- AffymetrixCdfFile$byChipType("MoGene-1_0-st-v1",tags="r3")
cs <- AffymetrixCelSet$byName("GSE15907",cdf=cdf)
print(cs)

The error I get is

[2010-01-28 11:41:18] Exception: Argument 'x' is of length 1 although
the range ([0,0]) implies that is should be empty.
  at throw(Exception(...))
  at throw.default(sprintf("Argument 'x' is of length %d although the
range ([%s
  at throw(sprintf("Argument 'x' is of length %d although the range
([%s,%s]) im
  at getIndices.Arguments(static, ..., length = length)
  at getIndices(static, ..., length = length)
  at method(static, ...)
  at Arguments$getIndex(idx, max = n)
  at getFile.GenericDataFileSet(this, 1)
  at getFile(this, 1)
  at getUnitNamesFile.AffymetrixCelSet(this)
  at getUnitNamesFile(this)
  at getChipType.AffymetrixCelSet(this)
  at getChipType(this)
  at sprintf("Chip type: %s", getChipType(this))
  at as.character.AffymetrixCelSet(x)
  at as.character(x)
  at print(as.character(x))
  at print.Object(cs)
  at print(cs)
Calls: print ... getIndices.Arguments -> throw -> throw.default ->
throw -> throw.Exception
Execution halted

Has anyone got any ideas as to where I'm going wrong?

Cheers,

Mike Dewar

-- 
When reporting problems on aroma.affymetrix, make sure 1) to run the latest 
version of the package, 2) to report the output of sessionInfo() and 
traceback(), and 3) to post a complete code example.


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