Ho to extract words between two hyphens?

Question

How to extract all between two hyphens in R

   ts = ("az_bna_njh","j_hj_lkiuy","ml_", "_kk")

I need to extract bna,hj,ml, and kk

Answer 1

Also you can try:

#Data
ts = c("az_bna_njh","j_hj_lkiuy","ml_", "_kk")
#Code
gsub(".*_(.*)\\_.*", "\\1", trimws(ts,whitespace = '_'))

Output:

[1] "bna" "hj"  "ml"  "kk"