[BioC] affy cel + cdf files content
Fri, 28 Jun 2002 08:23:07 +0200
This message is not directly related to Bioconductor yet I hope it might be of general interest for users...
The first line of an Affymetrix Yg_s98 yeast chip .cel file looks like this
X Y MEAN STDV NPIXELS
0 0 232 45 36
I read about 100 pixels were used whereas it seems that no more than 36 are used here.
How is the svd calculated ?
The first line of the corresponding .cdf file reads :
X Y PROBE PLEN ATOM INDEX MATCH BG
167 80 N 20 1 42887 0 0
Can anyone tell me the meaning of the last 6 columns.
Thanks in advance.