[R] "firstthat"?

[Peter Dalgaard BSA]

Thomas Lumley <tlumley at u.washington.edu> writes:

> On Tue, 20 Feb 2001, Duncan Murdoch wrote:

> > x _ runif(100)
> > x[firstthat(x > 0.8)]
> >
> 
> firstthat<-function(x) min(which(x))
> 
> does roughly what you want. It returns integer infinity if
> there are no matches.

Um. The result of which() is sorted, so how about

firstthat<-function(x) which(x)[1]

(gives NA if no matches)

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
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