Remove all text before colon

Question

I have a file containing a certain number of lines. Each line looks like this:

TF_list_to_test10004/Nus_k0.345_t0.1_e0.1.adj:PKMYT1 

I would like to remove all before ":" character in order to retain only PKMYT1 that is a gene name. Since I'm not an expert in regex scripting can anyone help me to do this using Unix (sed or awk) or in R?

Answer 1

Here are two ways of doing it in R:

foo <- "TF_list_to_test10004/Nus_k0.345_t0.1_e0.1.adj:PKMYT1"  # Remove all before and up to ":": gsub(".*:","",foo)  # Extract everything behind ":": regmatches(foo,gregexpr("(?<=:).*",foo,perl=TRUE)) 

Answer 2

A simple regular expression used with gsub():

x <- "TF_list_to_test10004/Nus_k0.345_t0.1_e0.1.adj:PKMYT1" gsub(".*:", "", x) "PKMYT1" 

See ?regex or ?gsub for more help.