chr: Extract chromosome or chunk from file names
In cbaumbach/genFun: Functions For Dealing With Genetic Data

Description Usage Arguments Value Examples

Extract chromosome or chunk from file names

1 2	chr(xs, pattern = ".chr([^_]+)") chunk(xs, pattern = ".chr[^_]+_(\\d+)")

`xs`	File names.
`pattern`	Extended regular expression pattern (see `regex`) used to extract the substrings corresponding to chromosome or chunk number from ‘xs’.

chr returns an integer vector of chromosome numbers unless the conversion from character to integer would lead to missing values, in which case a character vector is returned.

chunk returns an integer vector of chunk numbers.

library(genFun)

chr(c("chr5_path/to/the_chr1_3.txt", "chr5_path/to/the_chr2_4.txt"))
chunk(c("chr5_path/to/the_chr1_3.txt", "chr5_path/to/the_chr2_4.txt"))