arithmetic comparison over corresponding values from two vectors
sapply(trgroup, function(x) which(x>=starts & x <=ends)) works for your example data, but there's probably a better way HTH KJ "T Joshi" <tejalonline at gmail.com> wrote in message news:11417a880902100902w53664a3dq11aee64a963d8383 at mail.gmail.com...
Hi, I have scenario in which I wish to check whether numeric values in one array falls within the range of numbers defined over corresponding values in two other vectors: starts = c(12,45,67,110) ends=c(24, 58,102,150) trgroup=c(18,87) The result should be "1,3" , indices of vector starts/ends. which(trgroup>=starts & trgroup<=ends) wouldn't give required result. I don't want to write a for loop for doing this. Kindly help with ideas. Josh