crmn (version 0.0.21)

makeX-methods: Make X

Description

Construct a design matrix

Usage

makeX(object, factors, ...)
# S4 method for ANY,matrix
makeX(object, factors, ...)
# S4 method for ExpressionSet,character
makeX(object, factors, ...)

Arguments

object

an ExpressionSet

factors

column names from the pheno data of object or a design matrix

...

not used

Value

a design matrix

Details

Make a design matrix from the pheno data slot of an expression set, taking care that factors and numerical are handled properly. No interactions are included and formula is the most simple possible, i.e. y~-1+term1+term2+.... Can also be given anything as object in which case factor must be a design matrix. It that case the same design matrix is returned.

Examples

# NOT RUN {
data(mix)
makeX(mix, "runorder")
runorder <- mix$runorder
makeX(mix, model.matrix(~-1+runorder))
# }