[R] all occurences of an element in a vector

[Joshua Wiley]

On Mon, May 21, 2012 at 7:33 AM, carol white <wht_crl at yahoo.com> wrote:
> like searching m or [m,n] in [1,n,m,e,m,n,n,u].
>
> I want the exact match of all occurrences of m and n in the last vector. Therefore, grep is not helpful as it will extract if there are also mm and mmm.

I am pretty sure grep() is helpful if you are using the appropriate
regular expression to search for.  Like Ista, I am not sure exactly
what your search criteria are.  The easiest I think would be to give
us some examples.  Say give three vectors and what the desired output
from your search is.

Josh

>
> Cheers,
>
> Carol
>
>
> ________________________________
>  From: Ista Zahn <istazahn at gmail.com>
>
> Cc: "r-help at stat.math.ethz.ch" <r-help at stat.math.ethz.ch>
> Sent: Monday, May 21, 2012 3:38 PM
> Subject: Re: [R] all occurences of an element in a vector
>
> Hi Carol,
>
> I'm not sure what a "sub-vector in a vector" is, but I think you might
> be looking for ?grep
>
> Best,
> Ista
>
>
>> Hi,
>> How do you identify all occurences of an element or a sub-vector in a vector as opposed to match, %in%, and intersect which find the first occurrence of an element?
>>
>> Cheers,
>>
>> Carol
>>
>>        [[alternative HTML version deleted]]
>>
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>> and provide commented, minimal, self-contained, reproducible code.
>        [[alternative HTML version deleted]]
>
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Joshua Wiley
Ph.D. Student, Health Psychology
Programmer Analyst II, Statistical Consulting Group
University of California, Los Angeles
https://joshuawiley.com/