View source: R/recomb_map_inds.R
recomb_map_inds | R Documentation |
Given a list of individuals with recombination breaks given in genetic distance (such as the output of recomb_fam()
), and a genetic map (see recomb_map_hg
), this function determines all positions in base pair coordinates.
If base pair positions existed in input, they are overwritten.
recomb_map_inds(inds, map)
inds |
The list of individuals, each of which is a list with two haploid individuals named |
map |
The genetic map, a list of chromosomes each of which is a data.frame/tibble with columns |
Genetic positions are converted to base pair positions from the provided map using linear interpolation, using stats::approx()
with options rule = 2
(out of range cases are set to nearest end's value) and ties = list( 'ordered', mean )
(assume data is ordered, interpolate ties in genetic distance in map using mean of base pair positions).
Output will be incorrect, without throwing errors, if genetic map is not ordered.
Base pair positions are rounded to integers.
The input list of individuals, with each chromosome added column pos
corresponding to end coordinate in base pairs.
Each chromosome has columns reordered so pos
, posg
, and anc
appear first, and any additional columns appear afterwards.
recomb_fam()
for drawing recombination breaks of individuals from a pedigree.
recomb_map_hg
for simplified human recombination maps included in this package.
# Lengthy code creates individuals with recombination data to map # The smallest pedigree, two parents and a child (minimal fam table). library(tibble) fam <- tibble( id = c('father', 'mother', 'child'), pat = c(NA, NA, 'father'), mat = c(NA, NA, 'mother') ) # use latest human recombination map, but just first two chrs to keep this example fast map <- recomb_map_hg38[ 1:2 ] # initialize parents with this other function founders <- recomb_init_founders( c('father', 'mother'), map ) # draw recombination breaks for child inds <- recomb_fam( founders, fam ) # now use this function to add base pair coordinates for recombination breaks! inds <- recomb_map_inds( inds, map )
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