Find markers closest to specified set of positions, or within a specified interval.
A map object: a list (corresponding to chromosomes) of
vectors of marker positions. Can also be a snpinfo object (data
frame with columns
A vector of chromosomes
A vector of positions
A pair of positions (provide either
pos is provided,
interval should not be, and vice versa.
pos is provided, then
either be the same length, or one of them should have length 1 (to
be expanded to the length of the other).
interval is provided, then
chr should have length 1.
A vector of marker names, either closest to the positions
pos, or within the interval defined by
1 2 3 4 5 6 7 8 9 10
iron <- read_cross2(system.file("extdata", "iron.zip", package="qtl2")) # find markers by their genetic map positions find_marker(iron$gmap, c(8, 11), c(37.7, 56.9)) # find markers by their physical map positions (two markers on chr 7) find_marker(iron$pmap, 7, c(44.2, 108.9)) # find markers in an interval find_marker(iron$pmap, 16, interval=c(35, 80))
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