Calculate all ratio pairs

Description

Calculations all possible ratios for the assayData columns in an "MSnSet". The function getRatios(x, log = FALSE) takes a matrix x as input and is used by exprsToRatios.

Methods

signature(object = "MSnSet", log = "logical")

If log is FALSE (default) the ratios for all the assayData columns are computed; otherwise, log ratios (differences) are calculated.

signature(object = "matrix", log = "logical")

As above, but for a matrix instance.

Examples

data(msnset)
pData(msnset)
head(exprs(msnset))
r <- exprsToRatios(msnset)
head(exprs(r))
pData(r)