[6374] in s-news-athena
Indices corresponding to a condition
daemon@ATHENA.MIT.EDU (wand@agsm.unsw.edu.au)
Fri Feb 3 01:00:56 1995
From: wand@agsm.unsw.edu.au
To: s-news@utstat.toronto.edu (S-PLUS news)
Date: Fri, 3 Feb 1995 16:20:08 +1000 (EET)
How does one find the indices of the entries of
an array that satisfy a certain condition?
For example, suppose
a <- c(0.34,0.56,0.12,0.67,0.98,0.41)
and you want the indices of those
entries of "a" that are between 0.2 and 0.8;
i.e. you want to obtain the array with entries
1 2 4 6
Is there an easy way to do this?
Matt Wand
Australian Graduate School of Management,
wand@agsm.unsw.edu.au
