[R] What is wrong with this code?

Stephan Kolassa Stephan.Kolassa at gmx.de
Wed Jun 30 22:57:52 CEST 2010


your problem is called "string matching". Search for that term on 
rseek.org, there are a couple of functions and packages. And Wikipedia 
can tell you everything you ever wanted to know about string matching 
(and more).


Cable, Samuel B Civ USAF AFMC AFRL/RVBXI schrieb:
>>> 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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> and provide commented, minimal, self-contained, reproducible code.

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