maffy.subset: Select Subset
In affy: Methods for Affymetrix Oligonucleotide Arrays

Description Usage Arguments Details Value Author(s) References See Also Examples

Select a subset of rows with small rank-range over columns.

1 2	maffy.subset(data,subset.size=5000,maxit=100, subset.delta=max(round(subset.size/100),25),verbose=FALSE)

`data`	a matrix
`subset.size`	desired size of subset
`maxit`	maximum number of iterations
`subset.delta`	maximum deviation from subset.size
`verbose`	logical value.

Please refer to references.

A list with component subset, the indexes for subset.

Magnus Astrand

Astrand, M. (2001) http://www.math.chalmers.se/~magnusaa/maffy/

maffy.normalize

if (require(affydata)) {
  #data(Dilution)
  #x <- log2(pm(Dilution)[,1:3])
  #Index <- maffy.subset(x,subset.size=100)$subset
  #mva.pairs(x[Index,])
}