Note that there is a Task View for ecology at: http://cran.miscellaneousmirror.org/src/contrib/Views/Environmetrics.html
On 3/13/06, Dave Roberts <[EMAIL PROTECTED]> wrote: > In addition to the references from Professor Ripley, you might be > interested in the R packages and pages maintained by ecologists for such > work (even if you're doing movies). Packages labdsv, vegan, and ade4 > both have a broad variety of distance/dissimilarity indices and numerous > alternative ordination programs. You might also be interested in an > ecologically oriented web page at: > > http://ecology.msu.montana.edu/labdsv/R > > Dave R. > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > David W. Roberts office 406-994-4548 > Professor and Head FAX 406-994-3190 > Department of Ecology email [EMAIL PROTECTED] > Montana State University > Bozeman, MT 59717-3460 > > Frank Thomas wrote: > > Sorry that I send this text for a second time - I didn't see my posting > > before (though I have set the preferences to see them) > > > > If you want a comparison of different distance measures you might try > > the manuscript of Johann Bacher who is a specialists in cluster methods. > > He published an in-depth text on his web site > > http://www.soziologie.wiso.uni-erlangen.de/koeln/ > > > > Regards, > > F. Thomas > > Prof Brian Ripley wrote: > > > >>`Ordination' is ecologists' terminology for multidimensional scaling. > >>You will find worked examples in MASS (the book, see the R FAQ), and the > >>two most commonly used functions, isoMDS and sammon, in MASS the package. > >> > >>In your example, the main issue is going to be to choose an appropriate > >>dissimilarity measure, and dist() (in stats) and daisy() in package > >>cluster will give you a good start. > >> > >>On Sat, 11 Mar 2006, David Woods wrote: > >> > >> > >> > >>>I am severely rusty re. multivariate / ordination analysis, having done > >>>my last work 40 years ago (in plant ecology). I am interested in > >>>exploring applications of multivariate analytic approaches to data from > >>>the history of motion picture films. I'd very much appreciate any > >>>pointers as to possibly appropriate proceedures. The individual > >>>"samples" may be individual films and the measurements may be the > >>>presence and absence of actors and production personel; for example two > >>>films with many actors and / or crew in common would be located close > >>>together in the resultant ordination, while films with few or no > >>>personel in common would be located far apart. > >>> > >> > >> > >> > >>>May I express my appreciation in advance to any helpful recipients. > >>>cordially > >>>David Woods > >>> > >>>Dr. David Woods M.B.K.S. > >>>Holcus Ltd. > >>>16 John Street > >>>Kingston Square > >>>Hull HU2 8DH > >>>East Yorkshire > >>>UK > >>> > >>>tel. 44 (0)1482 323421 > >>>cel (0781) 259 1772 > >>> [[alternative HTML version deleted]] > >>> > >>>______________________________________________ > >>>R-help@stat.math.ethz.ch mailing list > >>>https://stat.ethz.ch/mailman/listinfo/r-help > >>>PLEASE do read the posting guide! > >>>http://www.R-project.org/posting-guide.html > >>> > >>> > >> > >> > > > > > > > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html