drop.nullmarkers: Drop markers without any genotype data
In byandell/qtl: Tools for analyzing QTL experiments

Description Usage Arguments Value Author(s) See Also Examples

Drop markers, from the data matrices and genetic maps, that have no genotype data.

1	drop.nullmarkers(cross)

cross

An object of class cross. See read.cross for details.

The input object, with any markers lacking genotype data removed from the genotype data matrices, genetic maps, and, if applicable, any derived data (such as produced by calc.genoprob). (It might be a good idea to re-derive such things after using this function.)

Karl W Broman, kbroman@biostat.wisc.edu

nullmarkers, drop.markers, clean.cross, geno.table

# removes one marker from hyper
data(hyper)
hyper <- drop.nullmarkers(hyper)

# shouldn't do anything to listeria
data(listeria)
listeria <- drop.nullmarkers(listeria)