function to write simulation output as PLINK style data
write_as_plink(
input_pop,
marker_locations,
file_name_prefix,
chromosome = 1,
recombination_rate = 1
)
input population, either of class "population" or of class "genomeadmixr_data"
location of markers, in bp
prefix of the ped/map files.
chromosome indication for map file
recombination rate in cM / kb
No return value