Am Dienstag 16 Dezember 2008 17:13:33 schrieb Wayne F: > stephen sefick wrote: > > yes a parallel coordinates plot- I understand that it is for > > multivariate data, but I am having a hard time figuring out what it is > > telling me. Thanks for your help. > > In the lattice book, the author mentions that static parallel plots aren't > very useful, in general. While for some data they are just natural: e.g. when spectra are treated as multidimensional data. Then the parallel coordinate plot just gives you the spectrum. Of course, in this situation it is maybe the treatment as high-dimensional data that is somewhat weird for spectra.
However, this offers a way, that might help understanding what's going on. I have a data set of p dimensions. E.g. spectra measured with p channels. Now, we can either think of such a spectrum as a point in p-d. E.g. a spectrum consisting of red, green, blue intensity is at a certain point in rgb-space. On the other hand, here the p dimensions have something to do with each other (e.g. an intrinsic order, let's say, by the wavelength). So it does make sense to plot the intensity over the p dimensions. That's the parallel coordinate plot. What you can tell from such a plot, depends very much on your data, and how you treated it. Claudia -- Claudia Beleites Dipartimento dei Materiali e delle Risorse Naturali Università degli Studi di Trieste Via Alfonso Valerio 6/a I-34127 Trieste phone: +39 (0 40) 5 58-34 47 email: cbelei...@units.it ______________________________________________ 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.