Thanks Jim, The morphometry software I mentioned outputs distance matrices in the format:
0.0000 7.1598 0.0000 8.7241 8.3506 0.0000 9.5217 7.2457 2.5642 0.0000 I would have liked to write to a file the same type of matrix in R, to ensure the same data format. Mantel for Windows is optimally setup to take this type of matrix. Thanks jholtman wrote: > > How do you want the lower half written out? can you give us an > example of the input matrix and then what you would expect to see on > the output. Is it still a matrix with the upper half set to zero/NA? > Do you want it as a vector? What is the other program expecting as > input? > > You need to provide more information so that we can provide suggestions. > > On Fri, Jul 25, 2008 at 7:03 AM, pgseye <[EMAIL PROTECTED]> wrote: >> >> Hi, >> >> I'm very new to R. I want to know if there is any way to write only the >> lower half of a distance matrix created in R to a csv file for example. >> I >> get the 'cannot coerce class "dist" into a data.frame' message when I >> try. >> I have used as.matrix and can write to a file this way, but as a full >> matrix. >> >> The reason I only want the lower half is that I've been doing some Mantel >> correlations with distance matrices (of Procrustes distances) generated >> by >> other (geometric morphometric) software that are in this format. However, >> I'm needing to use an alternative such as R to calculate distance >> matrices >> of Fourier coefficients which the other software can't do. So far, the >> Mantel correlations calculated from these two matrices (with R and also >> another software (Mantel for Windows)) are slightly different (when they >> should be exactly the same) and I'm wondering whether it's because the >> input >> format is different (ie one full, one half). >> >> Thanks, >> >> Paul >> >> >> -- >> View this message in context: >> http://www.nabble.com/Write-lower-half-of-distance-matrix-only-tp18649556p18649556.html >> Sent from the R help mailing list archive at Nabble.com. >> >> ______________________________________________ >> [email protected] 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. >> > > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What is the problem you are trying to solve? > > ______________________________________________ > [email protected] 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. > > -- View this message in context: http://www.nabble.com/Write-lower-half-of-distance-matrix-only-tp18649556p18650794.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ [email protected] 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.
