all occurences of an element in a vector
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]] ______________________________________________ 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. ? ? ? ?[[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/