countXO {qtl} | R Documentation |
Count the number of obligate crossovers for each individual in a cross, either by chromosome or overall.
countXO(cross, chr, bychr=FALSE)
cross |
An object of class cross . See
read.cross for details. |
chr |
The chromosomes to investigate. If missing, all chromosomes are considered. |
bychr |
If TRUE, return counts for each individual chromosome; if FALSE, return the overall number across the selected chromosomes. |
For each individual we count the minimal number of crossovers that explain the observed genotype data.
If bychr=TRUE
, a matrix of counts is returned, with rows
corresponding to individuals and columns corresponding to
chromosomes.
If bychr=FALSE
, a vector of counts (the total number of
crossovers across all selected chromosomes) is returned.
Karl W Broman, kbroman@biostat.wisc.edu
data(hyper) plot(countXO(hyper))