comparegeno {qtl}R Documentation

Compare individuals' genotype data

Description

Count proportion of matching genotypes between all pairs of individuals, to look for unusually closely related individuals.

Usage

comparegeno(cross, what=c("proportion","number"))

Arguments

cross An object of class cross. See read.cross for details.
what Indicates whether to return the proportion or number of matching genotypes.

Value

A matrix whose (i,j)th element is the proportion or number of matching genotypes for individuals i and j.

Author(s)

Karl W Broman, kbroman@biostat.wisc.edu

See Also

nmissing

Examples

data(listeria)

output <- comparegeno(listeria)

# image of the proportions
n.ind <- nind(listeria)
image(1:n.ind, 1:n.ind, output, col=gray((0:99)/99),
      breaks=seq(0,1,len=101))

# histogram of the off-diagonal values
upper <- output[upper.tri(output)]
hist(upper, breaks=150,
     xlab="Proportion of matching genotypes")
rug(upper)

[Package qtl version 1.09-43 Index]