A student of mine wants to use R to do some nonmetric multidimensional scaling. According to the R FAQ, there's a package called pcurve that computes multidimensional scaling solutions, but I was not able to locate it the contrib page (I am a Windows user with R version 1.4.1). Can anyone tell me whether it is possible to do nonmetric multidimensional scaling with R, and if so, how? John -------------------------------------------------------------------- John Miyamoto, Dept. of Psychology, Box 351525 University of Washington, Seattle, WA 98195-1525 Phone 206-543-0805, Fax 206-685-3157, Email jmiyamot at u.washington.edu Homepage http://faculty.washington.edu/jmiyamot/ -------------------------------------------------------------------- -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
>>>>> "john" == John Miyamoto <jmiyamot at u.washington.edu> writes:john> A student of mine wants to use R to do some nonmetric multidimensional john> scaling. According to the R FAQ, there's a package called pcurve that john> computes multidimensional scaling solutions, but I was not able to locate john> it the contrib page (I am a Windows user with R version 1.4.1). Can john> anyone tell me whether it is possible to do nonmetric multidimensional john> scaling with R, and if so, how? I thought there was one in MASS? isoMDS(MASS) Kruskal's Non-metric Multidimensional Scaling cmdscale(mva) Classical (Metric) Multidimensional Scaling (see CRAN for the libraries). best, -tony -- A.J. Rossini Rsrch. Asst. Prof. of Biostatistics U. of Washington Biostatistics rossini at u.washington.edu FHCRC/SCHARP/HIV Vaccine Trials Net rossini at scharp.org -------------- http://software.biostat.washington.edu/ ---------------- FHCRC: M-W: 206-667-7025 (fax=4812)|Voicemail is pretty sketchy/use Email UW: Th: 206-543-1044 (fax=3286)|Change last 4 digits of phone to FAX (my friday location is usually completely unpredictable.) -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
I just searched http://finzi.psych.upenn.edu (the search part) and it seems that there are several packages that do multidimensional scaling: MASS (isoMDS), mva (cmdscale), etc. I certainly am not in a position to compare them. (I think it was invented by a psychologist, Roger Shepard.) Jon -- Jonathan Baron, Professor of Psychology, University of Pennsylvania Home page: http://www.sas.upenn.edu/~baron -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
pcurve is on the contrib webpage I have bookmarked: http://cran.r-project.org/src/contrib/PACKAGES.html According to the info provided on the web site the pcurve library requires the modreg, mva, mgcv, and MASS libraries. Sundar John Miyamoto wrote:> > A student of mine wants to use R to do some nonmetric multidimensional > scaling. According to the R FAQ, there's a package called pcurve that > computes multidimensional scaling solutions, but I was not able to locate > it the contrib page (I am a Windows user with R version 1.4.1). Can > anyone tell me whether it is possible to do nonmetric multidimensional > scaling with R, and if so, how? > > John > > -------------------------------------------------------------------- > John Miyamoto, Dept. of Psychology, Box 351525 > University of Washington, Seattle, WA 98195-1525 > Phone 206-543-0805, Fax 206-685-3157, Email jmiyamot at u.washington.edu > Homepage http://faculty.washington.edu/jmiyamot/ > -------------------------------------------------------------------- > > -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- > r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html > Send "info", "help", or "[un]subscribe" > (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch > _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._-- Sundar Dorai-Raj, Ph.D. Statistical Methods Engineer PDF Solutions, Inc. (972) 889-3085 x216 (214) 392-7619 cell sundard at pdf.com -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
On Fri, 19 Apr 2002, John Miyamoto wrote:> A student of mine wants to use R to do some nonmetric multidimensional > scaling. According to the R FAQ, there's a package called pcurve that > computes multidimensional scaling solutions, but I was not able to locate > it the contrib page (I am a Windows user with R version 1.4.1). Can > anyone tell me whether it is possible to do nonmetric multidimensional > scaling with R, and if so, how?pcurve fails make pkgcheck on Windows, *as mentioned in the ReadMe on that page on CRAN*. Its isomds function is a tiny variant of a copy of an older vsersion of my isoMDS function in package MASS (and the rest of it seems based on princurve or is yet another PCA function: there are already three others available for R). There are several other possibilities, cmdscale{mva}, sammon{MASS}, isoMDS{MASS} and xgvis{xgobi} all having some merits. `nonmetric MDS' is like `nonlinear models': it tells you what it is not (and even then the term `metric MDS' is not always used in the same sense). -- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._