Thanks to all who responded so quickly. ------------------------- cuncta stricte discussurus -------------------------
-----Ursprüngliche Nachricht----- Von: Chuck Cleland [mailto:[EMAIL PROTECTED] Gesendet: Sunday, March 30, 2008 5:45 PM An: Daniel Malter Cc: [EMAIL PROTECTED] Betreff: Re: [R] maximum of identical elements in a vector On 3/30/2008 5:35 PM, Daniel Malter wrote: > Hi, > > the problem I have is seemingly very simple, but not simple enough for > me to figure out. I just want to find the most (or least) frequent > element in the vector. > > a=c("Alice","Alice","Alice","Alice","Bob","Bob") > unique(a) > length(which(a=="Alice")) > > > unique(a) shows me that the elements in my vector are "Alice" and > "Bob". The latter expression gives 4 as the frequency of "Alice" in vector a. > To find the maximum frequency of the unique elements, however, it > assumes that I know that "Alice" is the most (or least) frequent > element. Therefore, how can find that "Alice" is the most frequent > element in this vector? I assume there is an easier way than > computationally intensive loops (for long vectors). > names(which.max(table(a))) [1] "Alice" > Cheers, > Daniel > > ------------------------- > cuncta stricte discussurus > > ______________________________________________ > R-help@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. -- Chuck Cleland, Ph.D. NDRI, Inc. (www.ndri.org) 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) 438-0894 ______________________________________________ R-help@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.
