This are distances but between male and female plants of the same species.
species A B C D E --> male A B C D | female I would like to do a Manteltest. Birgit Am 10.10.2007 um 16:59 schrieb Gustaf Rydevik: > On 10/10/07, Birgit Lemcke <[EMAIL PROTECTED]> wrote: >> Hello and sorry that I still haven´t found a solution for my problem. >> >> I need to extract the lower and upper triangle from a square matrix >> including the diagonal. This diagonal is not zero in that special >> case. >> I tried with as.dist >> >> w<-as.dist(w, diag = TRUE) >>> w >> 1 2 3 4 5 >> 1 0 >> 2 2 0 >> 3 3 8 0 >> 4 4 9 14 0 >> 5 5 10 15 20 0 >> >> but found no way to keep the diagonal that is in the matrix. >> >> I also tried this but as I expected it makes no difference: >> >> w<-matrix(1:25, ncol=5, nrow=5) >>> upperTriangle(w)<-NA >>> w >> [,1] [,2] [,3] [,4] [,5] >> [1,] 1 NA NA NA NA >> [2,] 2 7 NA NA NA >> [3,] 3 8 13 NA NA >> [4,] 4 9 14 19 NA >> [5,] 5 10 15 20 25 >>> w<-as.dist(w, diag = TRUE) >>> w >> 1 2 3 4 5 >> 1 0 >> 2 2 0 >> 3 3 8 0 >> 4 4 9 14 0 >> 5 5 10 15 20 0 >> >> Is there perhaps a possibility to give the diagonal as a vector >> within as.dist? >> >> I would be glad if somebody could help me. >> >> Greetings >> >> Birgit >> >> Birgit Lemcke >> Institut für Systematische Botanik >> Zollikerstrasse 107 >> CH-8008 Zürich >> Switzerland >> Ph: +41 (0)44 634 8351 >> [EMAIL PROTECTED] >> > > What do you want to do with the lower triangle matrix? > A distance matrix must be zero on the diagonal, since dist(a,a)==0 for > all a, so it cannot be distances that you measure. > > best, > Gustaf > > > -- > Gustaf Rydevik, M.Sci. > tel: +46(0)703 051 451 > address:Essingetorget 40,112 66 Stockholm, SE > skype:gustaf_rydevik Birgit Lemcke Institut für Systematische Botanik Zollikerstrasse 107 CH-8008 Zürich Switzerland Ph: +41 (0)44 634 8351 [EMAIL PROTECTED] ______________________________________________ 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.