[R] R Equivalent to matlab's find() command?

[Stephen Eglen]

hi,

Just a very simple question: is there an R equivalent to the matlab
command find(X) which returns the indices of vector X that store
non-zero elements?

e.g.
> find( [1 0 0 1 0])
ans =

  1  4

so, in R, how do I do:

ans <- rfind( c(1,0,0,1,0))

so that ans is the vector c(1,4)

thanks, stephen
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