On Tue, Sep 27, 2011 at 6:15 PM, Jean V Adams <jvad...@usgs.gov> wrote:
> For example,
>
> songs <- c("ABCABAABABABCAB", "ABACAB", "ABABCABCBC")
> counts <- gregexpr("ABC", songs)
> sapply(counts, length)
That will still return '1' for the case where its not found, because of the -1.
sapply(counts,function(x){sum(x>0)})
will return 0.
you might get faster performance if you do 'fixed=TRUE' on the
gregexpr call as well.
> P.S. 1981 Genesis album!
+1 bonus.
Barry
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