Hi, For the Mantel test, your matrices do not need to be Euclidean, but they do need to be symmetric. You could write a similar test that does not require a symmetric matrix, though.
Sarah On Tue, Mar 3, 2009 at 11:40 AM, Koen Hufkens <koen.hufk...@ua.ac.be> wrote: > Hi List, > > I would like to compare two (confusion) matrices. I ended up with the ade4 > mantel.rtest function as my best option. However it seems that my data is > non-euclidean in nature (is.euclid gives a FALSE). I attached both matrices > at the end of the document. > > Are there any tools to transform these matrices into an euclidean form so I > can use mantel.rtest with confidence. > > Other suggestions are also welcome. > > Kind regards, > Koen > > -- > > matrix 1 > > V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 V11 > 1 0 60 5 0 9 3 3 0 18 1 1 > 2 30 0 12 0 2 45 1 0 5 4 1 > 3 8 32 0 1 19 5 4 0 27 1 3 > 4 0 0 3 0 67 1 3 0 0 0 25 > 5 12 3 13 26 0 12 27 0 3 2 2 > 6 1 72 1 0 4 0 11 0 0 10 1 > 7 3 2 9 0 45 40 0 0 0 0 0 > 8 13 3 0 0 0 1 0 0 10 0 72 > 9 24 26 34 0 6 2 0 2 0 2 4 > 10 2 21 1 0 1 67 0 0 1 0 6 > 11 2 2 28 11 10 10 0 22 3 13 0 > > matrix 2 > > V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 V11 > 1 0 66 0 10 9 5 0 3 7 0 0 > 2 43 0 0 14 2 32 0 1 5 3 0 > 3 11 32 4 0 19 10 1 7 13 2 0 > 4 0 0 0 0 0 0 0 0 0 0 0 > 5 11 6 4 18 0 15 18 22 4 1 0 > 6 2 40 3 3 12 0 1 24 1 14 0 > 7 4 5 0 8 32 49 2 0 0 0 0 > 8 0 0 0 0 0 0 0 0 0 0 0 > 9 19 23 2 42 8 2 0 0 0 3 1 > 10 1 16 3 3 3 73 0 0 2 0 0 > 11 2 4 0 20 15 10 15 0 10 7 17 > -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ 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.