p2LL {annotate} | R Documentation |
For any chip, this function computes the map from unique Entrez Gene ID to all probes.
p2LL(data)
data |
The character string naming the chip. |
This is essentially the computation of the reverse map, we store probe
to Entrez gene information in the LOCUSID
environment. This is
used to compute the inverse mapping.
A list, with length equal to the number of unique Entrez Gene IDs on the chip, the elements correspond to the probes that map to the Gene ID.
R. Gentleman
if( require("hgu95av2") ) { x = p2LL("hgu95av2") table(sapply(x, length)) }