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_         


        

Answer 1

Some very simple move that I missed from the best response @Sacha Epskamp was to use the sub function, in this case to take everything before the ":"(instead of removing it), so it was very simple:

foo <- "TF_list_to_test10004/Nus_k0.345_t0.1_e0.1.adj:PKMYT1"

# 1st, as she did to remove all before and up to ":":
gsub(".*:","",foo)

# 2nd, to keep everything before and up to ":": 
gsub(":.*","",foo)

Basically, the same thing, just change the ":" position inside the sub argument. Hope it will help.