psmeans {LMGene} | R Documentation |
This is used to estimate expression levels of genes based on the measurements for the relevant probes.
psmeans(eS, ind)
eS |
A transformed, normalized expression set. |
ind |
A vector used to indicate which probes go into which probesets. |
The vector ind has form like c(1,1,1,2,2,2,2,3,3,4,4,4,...) Each entry corresponds to one probe and tells the number of the probeset it belongs to.
Returns an expression set with the same vlist as eS, but the matrix rows now correspond to probesets instead of individual probes.
John Tillinghast
data(sample.eS) data(sample.ind) transeS (sample.eS, 667, 65) -> trs.eS lnormeS(trs.eS) -> ntrs.eS psmeans (ntrs.eS, sample.ind) -> genesample.eS