[BioC] Reading of .DAT files using Bioconductor

Byron Ellis bellis@hsph.harvard.edu
Tue, 11 Feb 2003 22:37:20 -0500

AFAIK the Affymetrix DAT format is actually very simple (though its 
been quite some time since I looked at a DAT file). It is just a block 
of 16-bit intensity values in a simple raw format after a 512-byte 
header. The header contains the gridding information and well as the 
image extents... If you have photoshop around, you can actually open 
the DAT file in Photoshop using the "RAW" file format if you like :-)

On Tuesday, February 11, 2003, at 10:12  PM, Laurent Gautier wrote:

> On Tue, Feb 11, 2003 at 12:31:18PM -0800, Tapan Mehta wrote:
>> Hello,
>> I want to read .DAT files using Bioconductor. Is it
>> possible to do so or do I need to get the .CEL files
>> to perform the analysis. Please guide me.
>> Thanking you,
>> Tapan Mehta
> As far as I could figure it out, .DAT is a sort of Affymetrix
> tweaked tiff format (chip scan + grid). MAS (and may be 'dchip')
> only can deal with them. Unless somebody speaks
> up to suggests otherwise, you'll have to get the CEL from
> the DAT oustide bioconductor...
> Hopin' it helps,
> L.
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Byron Ellis (bellis@hsph.harvard.edu)
"Oook" - The Librarian