Dear mailing list,

I got trouble in creating custom cdf in bio conductor.

Source : 
http://groups.google.com/group/aroma-affymetrix/web/creating-cdf-files-from-scratch

According to below paragraph I'm using Flat2cdf.R function but in that the
input file contains 1st column probeID as numeric instead of string.
So the program is giving erros.If you have any idea about this program
please give me suggestion.



The main file for making the cdf is flat2cdf.R, a function in R that takes
a 'flat' file and converts it to a binary cdf file. The flat file is a tab
deliminated file with each row corresponding to a probe to be included in
the cdf. Right now the format of a 'flat' file is a bit rigid.

It must be:

    * tab-deliminated
    * have a header row
    * A column 'X' and 'Y' with the x,y coordinates of a file (there is an
argument that allows to pass other names, but not really tested yet)
    * A column identifying a probe to a group and a column identifying a
probe to a unit (for exon arrays, group=exon, unit=gene; for gene
arrays, unit=group=gene); these identifications will the group and
unit names respectively.
    * Other columns are allowed and will be ignored.

Example:
Probe_ID        X       Y       Probe_Sequence  Group_ID        Unit_ID
15      14      0       TCTCCAGTGAAGTGCACATTGCTCA       3029044
ENSG00000106144
17      16      0       TGATCGCCTGTCTGCAGATAGGGCA       2400195
ENSG00000090432
29      28      0       TGTAGCTACATGAGGTCTCAGCAGT       2690968
ENSG00000121577


Thanks and Regards
Naresh P



Thanks for your help in advance
Naresh





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