[R] What is wrong with this code?

[John Kane]

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)
=======================================================

Does this help?  Without a sample data set I'm guessing plus I'm lousy with text patterns. You almost certainly need someone who knows what they are doing. :)

--- On Wed, 6/30/10, Cable, Samuel B Civ USAF AFMC AFRL/RVBXI <Samuel.Cable at hanscom.af.mil> wrote:

> From: Cable, Samuel B Civ USAF AFMC AFRL/RVBXI <Samuel.Cable at hanscom.af.mil>
> Subject: Re: [R] What is wrong with this code?
> To: r-help at r-project.org
> Received: Wednesday, June 30, 2010, 4:22 PM
> 
> 
> > > Anyway, I still wouldn't mind some advice on
> character
> > > matching.
> > > Thanks.
> > >
> > If so we need a reproducible example of what you are
> doing.
> 
> OK, let's say I have three strings.  Str1="abc". 
> Str2="abcd".
> Str3="efgh".
> 
> I want to compare Str1 and Str2 in such a way that R
> detects that Str2
> indeed contains Str1.  I want something that returns a
> "TRUE" value.
> Then I want to compare Str1 and Str3 so that R detects that
> Str3 does
> not contain Str1.  I don't want it to give me an error
> because it can't
> find Str1.  I just want to get a "FALSE" value. 
> Is there a way to do
> this that's less messy than what I came up with? 
> Thanks again.
> 
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