[R] pattern search

From: Schmitt, Corinna <Corinna.Schmitt_at_igb.fraunhofer.de>
Date: Wed 04 Apr 2007 - 14:49:10 GMT


Dear R-experts,

I'm looking for an easy possibility for pattern search. I have got a string and a special pattern. I would like to know if the pattern appears in the string, if yes where does it appear (position) and the number of appearance.

Example:

Text = c("If the sun shines, no clouds should be seen in the sky!") SearchPattern = c("the")
NumberOfAppearance = 0
NumberOfLetters = 0

--> NumberOfAppearance should be 2 in the end

How can I get the string length (=number of letters stored in Text)?

Has anyone a good idea?

Thanks, Corinna



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