qtl (version 1.66)

drop.nullmarkers: Drop markers without any genotype data

Description

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

Usage

drop.nullmarkers(cross)

Value

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.)

Arguments

cross

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

Author

Karl W Broman,

See Also

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

Examples

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

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