Entering edit mode
Looks like it is a CEL file in the "new" Calvin CEL file format. Not
sure whether affyio::read.celfile.header() supports this or not.
affxparser::readCelHeader() should - try that first to verify that you
got valid CEL files. If that is the case, and affyio doesn't support
Calvin CEL files, then you can use affxparser::convertCel() to convert
them to good old XDA/binary CEL files, which affyio certainly
supports.
FYI, other Affymetrix-related packages handle Calvin CEL files
directly (particularly those utilizing affxparser), including
aroma.affymetrix.
My $.02
/Henrik
(author of aroma.affymetrix)
On Thu, Jun 28, 2012 at 2:16 PM, DaveW [guest] <guest at="" bioconductor.org=""> wrote:
>
> I'm attempting to read Affymetrix CEL files and failing miserably.
Any thoughts.
>
> Error in read.celfile.header(as.character(filenames[[1]])) :
> ?Is /home/dw/HDgenotypes/CEL
files/Titan_0020_772G_Hannotte_772_001_D06.CEL really a CEL file?
tried reading as text, gzipped text, binary, gzipped binary, command
console and gzipped command console formats
>
> Here is the output of the first few lines of one of the CEL files in
case this helps anyone to spot the issue:
>
> dw at dw-laptop:~/HDgenotypes/CEL files$ head Titan*H09.CEL
> ; ?J.!affymetrix-calvin-multi-
intensity60000065535-1336523928-0000026962-0000029358-0000011478en-US0
affymetrix-algorithm-nameHHT Image Calibration Cell Generation
> text/plain affymetrix-algorithm-version 3.2.0.1515
> text/plain affymetrix-array-type???Axiom_GW_Gal_SNP_1
> text/plain affymetrix-library-package???Universal
> text/plain affymetrix-cel-rows ???? text/x-calvin-integer-32
affymetrix-cel-cols ???? text/x-calvin-integer-32program-company
Affymetrix, Inc.
> text/plain
> ? ? ? ? ?program-nameFAffymetrix Genechip Command Console
> text/plain
> program-id 3.2.0.1515
> text/plain)affymetrix-algorithm-param-NumPixelsToUse ?text/x-calvin-
integer-32+affymetrix-algorithm-param-ImageCalibratioTRUE
> text/plain,affymetrix-algorithm-param-FeatureExtraction
>
>
>
> ?-- output of sessionInfo():
>
>> sessionInfo()
> R version 2.15.1 (2012-06-22)
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> locale:
> ?[1] LC_CTYPE=en_GB.UTF-8 ? ? ? LC_NUMERIC=C ? ? ? ? ? ? ?
LC_TIME=en_GB.UTF-8
> ?[4] LC_COLLATE=en_GB.UTF-8 ? ? LC_MONETARY=en_GB.UTF-8 ?
?LC_MESSAGES=en_GB.UTF-8
> ?[7] LC_PAPER=C ? ? ? ? ? ? ? ? LC_NAME=C ? ? ? ? ? ? ? ?
?LC_ADDRESS=C
> [10] LC_TELEPHONE=C ? ? ? ? ? ? LC_MEASUREMENT=en_GB.UTF-8
LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats ? ? graphics ?grDevices utils ? ? datasets ?methods ? base
>
> other attached packages:
> [1] affy_1.34.0 ? ? ? ?Biobase_2.16.0 ? ? BiocGenerics_0.2.0
>
> loaded via a namespace (and not attached):
> [1] affyio_1.24.0 ? ? ? ? BiocInstaller_1.4.7 ?
preprocessCore_1.18.0 tools_2.15.1
> [5] zlibbioc_1.2.0
>
> --
> Sent via the guest posting facility at bioconductor.org.
>
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