You might want to try *CEL File Conversion* Tool found at
http://www.affymetrix.com/support/developer/tools/devnettools.affx.
This is used to . ..  "convert all Affymetrix CEL files in a specified 
directory from version 3 format (ASCII - MAS 5 compatible format) _to 
and from_ version 4 format (binary - GCOS compatible format). You files 
may be version 4. If you convert them to version 3, you may have what 
you want. It is also possible to convert back to version 4 after some 
processing.

Matthew McCormack


James W. MacDonald wrote:
> Hi AA,
>
> A A wrote:
>> Hello Everyone,
>>
>> I am very new to using R and Bioconductor, so please bare with me.  I
>> have Affymetrix files that are in CEL format and i am trying to
>> convert them into text files so that I can work with them.  I have
>> been trying to use the command justSNPRMA, but I am not sure what to
>> do after I run the command.  I tried searching on the net to see if
>> there were step-by-step instructions for doing this, but I have not
>> been successful.  Would someone direct me to such a site or explain
>> this process to me?
>
> You might want to look at the posting guide, as this message fails to 
> meet even the minimum requirements. Some questions for you:
>
> 1.) What kind of Affymetrix files?
>
> 2.) What does 'work with them' mean?
>
> 3.) What (exact) code have you tried?
>
> 4.) What is your output from sessionInfo()?
>
> 5.) Who are you (anonymous questions are less likely to be answered)?
>
> Best,
>
> Jim
>
>
>>
>> Thanks,
>>
>> AA
>>
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