mark shanks wrote: > > Hi, > > I have a set of data in x,y coordinates across the range of -5 to 5 in each > dimension. I would like to obtain the frequency distribution of the > different points, and then graph them so you can see which of the points are > the most frequently occurring. > > This would seem to be easy in Matlab, which has the hist3 command for doing > frequency distributions/histograms in 3 dimensions. However, as far as I can > tell, R does not have a hist3 command.
If a 2D display is okay, you can use the color2D.matplot function in the plotrix package to plot the output of something like kde2d in MASS: x<-seq(-5,5,by=0.1) xdens<-kde2d(sample(x,500,TRUE),sample(x,500,TRUE),n=11) color2D.matplot(xdens$z,c(1,0),c(0,1),c(0,0), show.legend=TRUE,xlab="Columns",ylab="Rows") Jim ______________________________________________ [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
