Nothing
# function for subsetting by chromosome
#
# chr = logical, numeric, or character strings
# (numeric converted to character strings)
# all_chr = vector of character strings with all chromosome names
#
# result = vector of character strings (the selected ones)
subset_chr <-
function(chr, all_chr)
{
if(is.logical(chr)) {
if(length(chr) != length(all_chr))
stop("chr is logical but length [", length(chr), "] != n_chr is x [",
length(all_chr), "]")
chr <- all_chr[chr]
} else {
chr <- as.character(chr)
# look for negatives; turn to positives
if(any(grepl("^\\-", chr))) {
if(!all(grepl("^\\-", chr)))
stop("Can't mix negative and positive chr subscripts")
chr <- sub("^\\-", "", chr)
if(!all(chr %in% all_chr)) {
if(!any(chr %in% all_chr))
stop("None of the chr found in the cross object")
warning("Some chr not found: ", paste(chr[!(chr %in% all_chr)], collapse=", "))
chr <- chr[chr %in% all_chr]
}
chr <- all_chr[!(all_chr %in% chr)]
}
if(!all(chr %in% all_chr)) {
if(!any(chr %in% all_chr)) stop("None of the chromosomes in cross")
warning("Some chr not in cross: ", paste(chr[!(chr %in% all_chr)], collapse=", "))
chr <- chr[chr %in% all_chr]
}
}
chr
}
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