[BioC] CDF files

[Laurent Gautier]

Srinivas Iyyer wrote:
> Hi, 
> 
> CellHeader=X	Y	MEAN	STDV	NPIXELS
>   0	  0	152.0	30.0	 25
>   1	  0	5024.5	475.3	 20
>   2	  0	151.0	25.0	 25
>   3	  0	5017.0	558.9	 25
>   4	  0	205.5	71.5	 20
> 
> 
> 
> 
> 
> How can I get to know what 0 0 , 1 0, 2 0 correspond
> to 1001_at or XXXX_at.  Can some one please help. I
> want to get the spot and the corresponding probe. 

The information is contained in the relevant CDF file.

Did you consider using the 'affy' package ?

The help page for the function 'xy2indices' might be worth a look.

However, if you want to go from XY coordinates to probe set names often 
in your code, the most efficient
would be to use the class Cdf (now found in the package 'makecdfenv').


L.


> Thank you.
> 
> Srini
> 
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