On 2010-06-30 15:56, Cable, Samuel B Civ USAF AFMC AFRL/RVBXI wrote:
Okay, here is a reproducible example of a possible solution (actually
it
probably does not do what you want but it's a start for discussion.
Note it is actual code and data which is what is needed.
=======================================================
str1<- "abc"
str2<- "abcd"
str3<- "efgh"
grep(str1, str2)
grep(str1,str3)
=======================================================
Thanks for everybody's help on this and thanks for your patience with my
original mistake.
FWIW, grep doesn't quite do it because if I put it into an "if" test
if (grep(str1,str3) somethingsomething ) { ... }
and str3 does not contain str1, then R gets upset, won't even evaluate
the "if", and returns an error.
I'll take a look at grepl. Turns out I don't have it because I am
currently running rev. 2.8.1-1. Oh well.
Thanks again.
Well, you certainly should upgrade. But in the meantime,
try wrapping the grep call in length():
if(length(grep(Str1, Str2)) > 0) { stuff } else { other stuff }
-Peter Ehlers
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