Whoops, I inadvertently created a dataframe called aa and not a matrix, so the code below assumes aa is a dataframe and not a matrix.
> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Doran, Harold > Sent: Monday, May 19, 2008 8:15 AM > To: Jens Oldeland; [EMAIL PROTECTED] > Subject: Re: [R] Rank Values in a Matrix > > If your matrix below is called aa, you could do this > > > matrix(rank(aa, ties='min'), ncol=ncol(aa)) > [,1] [,2] [,3] [,4] > [1,] 4 8 1 11 > [2,] 14 11 11 5 > [3,] 15 5 5 1 > [4,] 15 8 8 1 > > This doesn't assign the values you list, but it does rank > them. OTOH, if you want as you have below, I think this works > > rank(unique(stack(aa)[1]))-1 > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Jens Oldeland > > Sent: Monday, May 19, 2008 7:47 AM > > To: [EMAIL PROTECTED] > > Subject: [R] Rank Values in a Matrix > > > > Dear All, > > > > a short and maybe simple question: > > > > > > I have to rank all values in a matrix from 0 to X, > > > > [1] [2] [3] [4] > > [1] 0.1 2 0 3 > > [2] 50 3 3 1 > > [3] 100 1 1 0 > > [4] 100 2 2 0 > > > > 0->0 > > 0.1->1 > > 2->2 > > 3->3 > > 50->4 > > 100->5 (X=5) > > > > is there any function for this? i have looked in several packages > > (vegan, labdsv etc.) because I am working with species by > site tables, > > but without success. perhaps I looked for the wrong terms > (rank matrix > > etc.) > > > > thank you for your help > > > > regards, > > Jens > > > > -- > > +++++++++++++++++++++++++++++++++++++++++ > > Dipl.Biol. Jens Oldeland > > University of Hamburg > > Biocentre Klein Flottbek and Botanical Garden Ohnhorststr. 18 > > 22609 Hamburg, > > Germany > > > > Tel: 0049-(0)40-42816-407 > > Fax: 0049-(0)40-42816-543 > > Mail: [EMAIL PROTECTED] > > [EMAIL PROTECTED] (for attachments > 2mb!!) > > http://www.biologie.uni-hamburg.de/bzf/fbda005/fbda005.htm > > +++++++++++++++++++++++++++++++++++++++++ > > > > ______________________________________________ > > 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. > > > > ______________________________________________ > 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. > ______________________________________________ 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.
