Frank:
> Dear R people, > I am trying to plot the results from running svm in library(e1071). I > use plot.svm. After searching through the help archives and FAQ, I > still have several questions: > 1. In default, crosses indicate support vectors. But why are there > two colors of crosses? What do they represent? The colors represent the classes of the data points. The help page admittedly doesn't tell you this and deserves improvement. > 2. I want to draw a white-gray colored plot and modify the different > colored crosses or circles by different shaped points. Could anyone > give me a hint? I just added three arguments to plot.svm() that allow customizing of the plot symbols. The contour region is controlled by the parameters of the filled.contour() function used in plot.svm(), so you will need to add the color.palette argument to plot.svm (which subsequently will be passed to filled.contour()). > 3. Is it possible for me to draw a "hyperplane" on the plot? You can add arbitrary objects to the plot (try lines()); but plot.svm() doesn't compute the boundaries. > 4. What is the algorithm to plot the contour region? see filled.contour(). The input is determined by a grid of predicted values. Best, -d > Thank you very much, > Frank -- Dr. David Meyer Department of Information Systems Vienna University of Economics and Business Administration Augasse 2-6, A-1090 Wien, Austria, Europe Fax: +43-1-313 36x746 Tel: +43-1-313 36x4393 HP: http://wi.wu-wien.ac.at/~meyer/ ______________________________________________ [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
