find_duplicated_loci: Find duplicates in the loci table

In tidypopgen: Tidy Population Genetics

Find duplicates in the loci table

Description

This function finds duplicated SNPs by checking the positions within each chromosome. It can return a list of duplicated SNPs or a logical value indicating whether there are any duplicated loci.

Usage

find_duplicated_loci(.x, error_on_false = FALSE, list_duplicates = TRUE, ...)

Arguments

.x	a vector of class vctrs_bigSNP (usually the genotype column of a gen_tibble object), or a gen_tibble.
error_on_false	logical, if TRUE an error is thrown if duplicated loci are found.
list_duplicates	logical, if TRUE returns duplicated SNP names.
...	other arguments passed to specific methods.

Value

if list_duplicates is TRUE, returns a vector of duplicated loci. If list_duplicates is FALSE, returns a logical value indicating whether there are any duplicated loci. If error_on_false is TRUE and there are duplicates, an error is thrown.

Examples

example_gt <- load_example_gt("gen_tbl")
show_loci(example_gt) <- test_loci <- data.frame(
  big_index = c(1:6),
  name = paste0("rs", 1:6),
  chromosome = paste0("chr", c(1, 1, 1, 1, 1, 1)),
  position = as.integer(c(3, 3, 5, 65, 343, 46)),
  genetic_dist = as.double(rep(0, 6)),
  allele_ref = c("A", "T", "C", "G", "C", "T"),
  allele_alt = c("T", "C", NA, "C", "G", "A"),
  chr_int = rep(1, 6)
)

show_loci(example_gt)

# Find which loci are duplicated
example_gt %>% find_duplicated_loci()

tidypopgen documentation built on Aug. 28, 2025, 1:08 a.m.