Hi.

On Fri, Oct 4, 2013 at 8:19 PM, Ann Loraine <alora...@gmail.com> wrote:
> I am working with ATH1/GPL198 Affymetrix microarrays and would like to use
> aroma to process a large set of arrays.
>
> I'm following the vignette on this page:
>
> http://www.aroma-project.org/vignettes/GeneSTArrayAnalysis
>
> But am stuck at this step:
>
> chipType <- "HuGene-1_0-st-v1"
> cdf <- AffymetrixCdfFile$byChipType(chipType, tags="r3")

You need to place the

http://aroma-project.org/setup

>
> What should I use for "chipType"?
>
> I tried "ATH1" and "GPL198" but got this error:
>
>> AffymetrixCdfFile$byChipType('ATH1',tags="r3")
> [2013-10-04 23:17:44] Exception: Failed to create AffymetrixCdfFile object.
> Could not locate an annotation data file for chip type 'ATH1' with tags 'r3'
> and with filename extension 'cdf'.
>
>   at #03. byChipType.UnitAnnotationDataFile(static, ...)
>           - byChipType.UnitAnnotationDataFile() is in environment
> 'aroma.core'
>
>   at #02. byChipType(static, ...)
>           - byChipType() is in environment 'aroma.core'
>           - originating from '<text>'
>
>   at #01. AffymetrixCdfFile$byChipType("ATH1", tags = "r3")
>           - AffymetrixCdfFile$byChipType() is local of the calling function
>
> Error: Failed to create AffymetrixCdfFile object. Could not locate an
> annotation data file for chip type 'ATH1' with tags 'r3' and with filename
> extension 'cdf'.

First, make sure to read http://aroma-project.org/setup/ so you
understand where CDF file goes.  The download the binary CDF that I've
created:

 http://aroma-project.org/chipTypes/ATH1-121501

because the one that Affymetrix provides is in an ASCII format which
is very slow to work with.  The retry with:

cdf <- AffymetrixCdfFile$byChipType("ATH1")

You should not use an 'r3' tags, because the CDF has no such tag part
of its filename.  To understand what the term "tag" means, see
http://aroma-project.org/definitions/.  I strongly recommend that you
make sure that you understand how filenames, directory names and
fullname, name, tags are related - it really helps.

/Henrik

>
>
> --
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-- 
-- 
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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