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
:-)
...............................................
Alberto de Luis (aldeluis@usal.es)
Centro de Investigación del Cáncer
Cancer Research Center
Campus Miguel de Unamuno 37007
Salamanca (Spain)
...............................................
Hello,
Thanks a lot for your help. I will try this option and
get back to you if required. Thanks once again.
Tapan
--- Alberto de Luis Calvo <aldeluis@usal.es> wrote:
> 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 :-)
>
> ...............................................
> Alberto de Luis (aldeluis@usal.es)
> Centro de Investigación del Cáncer
> Cancer Research Center
> Campus Miguel de Unamuno 37007
> Salamanca (Spain)
> ...............................................
