class.factor.format {MCRestimate} | R Documentation |
This function creates a factor whose levels represent the
different classes for a classification problem. It is derived from the
column specified in the argument class.column
. If the factor
has more than two levels, the argument reference.class
can be
used to transform this into a two-class problem: reference class
versus the rest.
class.factor.format(x, class.column, reference.class=NULL)
x |
an exprSet |
class.column |
either a number or a character string specifying
the relevant column of the phenoData slot in x |
reference.class |
character. If specified the result will be is a factor with only 2 levels: the reference class versus all other |
A factor of length nrow(pData(x))
Markus Ruschhaupt mailto:m.ruschhaupt@dkfz.de
library(MCRestimate) data(eset) class.factor.format(eset, "cov3",reference.class=1)