I am using the order function and the result seems to be incorrect:> a<-c(20,30,15,40) > order(a)[1] 3 1 2 4 Any suggestions? Thanks, Laura -- View this message in context: nabble.com/Incorrect-order-tp20224993p20224993.html Sent from the R help mailing list archive at Nabble.com.
What's wrong with that result? you should look at the result as: first take the 3th element of a, then the first one, than the second one and then the fourth. if you do a[order(a)] then you get 15,20,30,40. I suppose you expected: rank(a) [1] 2 3 1 4 Good luck Bart lll73 wrote:> > > I am using the order function and the result seems to be incorrect: > >> a<-c(20,30,15,40) >> order(a) > [1] 3 1 2 4 > > Any suggestions? > > Thanks, > Laura > >-- View this message in context: nabble.com/Incorrect-order-tp20224993p20225235.html Sent from the R help mailing list archive at Nabble.com.
Laura, Order works fine. The output tells you that the third element of a is the smallest, the first element is a second smallest, ... Try a[order(a)] that should be equal to sort(a). HTH, Thierry ------------------------------------------------------------------------ ---- ir. Thierry Onkelinx Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, methodology and quality assurance Gaverstraat 4 9500 Geraardsbergen Belgium tel. + 32 54/436 185 Thierry.Onkelinx op inbo.be inbo.be To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher The plural of anecdote is not data. ~ Roger Brinner The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data. ~ John Tukey -----Oorspronkelijk bericht----- Van: r-help-bounces op r-project.org [mailto:r-help-bounces op r-project.org] Namens lll73 Verzonden: woensdag 29 oktober 2008 12:18 Aan: r-help op r-project.org Onderwerp: [R] Incorrect order I am using the order function and the result seems to be incorrect:> a<-c(20,30,15,40) > order(a)[1] 3 1 2 4 Any suggestions? Thanks, Laura -- View this message in context: nabble.com/Incorrect-order-tp20224993p20224993.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help op r-project.org mailing list stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Dit bericht en eventuele bijlagen geven enkel de visie van de schrijver weer en binden het INBO onder geen enkel beding, zolang dit bericht niet bevestigd is door een geldig ondertekend document. The views expressed in this message and any annex are purely those of the writer and may not be regarded as stating an official position of INBO, as long as the message is not confirmed by a duly signed document.
Hi, I believe Bart answered to your question. What is the solution you are expecting? If you don't give us more explanations we cannot understand what is wrong for you. > help(sort) |order| returns a permutation which rearranges its first argument into ascending or descending order, breaking ties by further arguments. |sort.list| is the same, using only one argument. See the examples for how to use these functions to sort data frames, etc. In the section "see also" of the help about sort there are the two functions sort and rank! > a<-c(20,30,15,40) > sort(a) [1] 15 20 30 40 > order(a) [1] 3 1 2 4 > rank(a) [1] 2 3 1 4 Alain lll73 wrote:> I am using the order function and the result seems to be incorrect: > > >> a<-c(20,30,15,40) >> order(a) >> > [1] 3 1 2 4 > > Any suggestions? > > Thanks, > Laura > >-- Alain Guillet Statistician and Computer Scientist Institut de statistique - Université catholique de Louvain Bureau d.126 Voie du Roman Pays, 20 B-1348 Louvain-la-Neuve Belgium tel: +32 10 47 30 50 [[alternative HTML version deleted]]