Great, thanks for that Jim, It does what I need it do do.
Regards, Paul jholtman wrote: > > Does this do what you want: > >> x <- matrix(1:25,5) >> x > [,1] [,2] [,3] [,4] [,5] > [1,] 1 6 11 16 21 > [2,] 2 7 12 17 22 > [3,] 3 8 13 18 23 > [4,] 4 9 14 19 24 > [5,] 5 10 15 20 25 >> x[upper.tri(x)] <- NA >> write.table(x, na="", row.names=FALSE, col.names=FALSE) > 1 > 2 7 > 3 8 13 > 4 9 14 19 > 5 10 15 20 25 >> > > > On Fri, Jul 25, 2008 at 8:30 AM, pgseye <[EMAIL PROTECTED]> wrote: >> >> 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. >> > > > > -- > 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-tp18649556p18662636.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.
