.BG M
.VE $Header: /usr3/s/current/s/data/.help/RCS/which,v 1.2 83/12/30 23:10:46 rab Exp $
.FN which
.TL
?which: Find Which Observations Satisfy a Condition
.CS
?which(condition)
.PP
.AG condition
logical expression.
Missing values (NAs) are allowed.
.RT
vector of subscripts that tell which observations satisfy
`condition'.
.EX
# observation numbers for tall people under 30
?which(age<30 & height>72)  
.KW logic
.WR
