maffy.subset {affy}R Documentation

Select Subset

Description

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

Usage

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

Arguments

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

Details

Please refer to references.

Value

A list with component

subset the indexes for subset.

Author(s)

Magnus Åstrand

References

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

See Also

maffy.normalize

Examples

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

[Package affy version 1.4.32 Index]