[BioC] Methods to access GeneName to ProbeID in package Affy

[w.huber at dkfz-heidelberg.de]

Hi Mark,

> To prepare a table of ProbeID versus AffyID either for the whole
> collection or a subset, would I rely on the x and y to give me the
> coordinates of the feature on the chip and then use the xy2i() function
> to compute an index, 'i', to extract a row from the AffyBatch object?

Yes, that's correct. There is 1:1 mapping between (x,y) and i, and these
serve as probe identifiers.

Best wishes
 Wolfgang.