[BioC] Opening a .DAT

[Alberto de Luis Calvo]

Yes, you can open a DAT file in Photoshop with the CLS and RWS 
parameters
given in the DAT header or the CEL header, (actually the image 
dimensions in pixels).

(example for hgu133a)

CLS=4733
RWS=4733

(example for TEST3)

CLS=1167
RWS=1167

You can type this dimensions in the "Raw Options" dialog of photoshop, 
set "Depth" to 16 Bits, "Byte Order" to IBM PC and click in "Guess" 
button to leave photoshop to set the Header Size (in these cases: 512 
byte).


In adition to Byron Ellis (bellis@hsph.harvard.edu)
Date: 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 :-)

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Alberto de Luis (aldeluis@usal.es)
Centro de Investigación del Cáncer
Cancer Research Center
Campus Miguel de Unamuno 37007
Salamanca (Spain)
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