If you have many data points and/or have to depict several groups of them on the same graphics, and are -- to gain clarity -- willing to substitute
- points with their <summary> (i.e, convex hull or density contour, plus a cross or ellipse depicting measures of centre and variability), and - marginal histograms with either relative frequency polygons or density estimates, just use the package chplot. It's available at CRAN and extremely easy to use (for R standards) - see the PDF manual. The added benefit is depicting correlation with the ellipse, and obtaining a bivariate measure of variability. After you produce the plot with the chplot function, you can add further elements with the chadd function. The package also contains one sample (large) datadaset. A paper (in CMPB, 2005) about is available at http://www1.mf.uni-lj.si/ibmi/biostat-center/predtiski/CMPB_Vidmar_Pohar_chplot.pdf. Note that chplot allows you to depict the points themselves, too (and even skip the convex hull/density contour), but that is basically the oposite of its main idea, which is to provide clarity with many points (from hundreds to hundreds of thousands) and/or several groups. Best regards, Assist.Prof. Gaj Vidmar, PhD Institute for Rehabilitation, Republic of Slovenia & Univ. of Ljubljana, Fac. of Medicine, Inst. of Biomedical Informatics "Deepayan Sarkar" <deepayan.sar...@gmail.com> wrote in message news:eb555e660902111259o1c118567y4e0cc3812dce5...@mail.gmail.com... > On Wed, Feb 11, 2009 at 12:37 PM, John Leonard > <john.leon...@coe.gatech.edu> wrote: >> I am trying to replicate the following plot using Lattice: >> >> http://addictedtor.free.fr/graphiques/graphcode.php?graph=78 > > Why? lattice is not the right tool for this. > > Try looking at > > http://www.stat.wisc.edu/~deepayan/771/esplot.R > > with explanations in > > http://www.stat.wisc.edu/~deepayan/771/rgraphics.pdf > > -Deepayan > > ______________________________________________ > 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. > ______________________________________________ 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.