Cristian cristian wrote: > Hi all, > I'm an R newbie, > I did this script to create a scatterplot using the "tree" matrix from > "datasets" package: > > library('datasets') > with(trees, > { > plot(Height, Volume, pch=3, xlab="Height", ylab="Volume") > symbols(Height, Volume, circles=Girth/12, fg="grey", inches=FALSE, > add=FALSE) > } > ) > > I'd like to use the column Named "Height" to fill the circles with colors > (ex.: the small numbers in green then yellow and the high numbers in red). > I'd like to have a legend for the size and the colors too. > I did it manually using a script like that: > color[(x>=0.001)&(x<0.002)]<-"#41FF41" > color[(x>=0.002)&(x<0.003)]<-"#2BFF2B" > color[(x>=0.003)&(x<0.004)]<-"#09FF09" > color[(x>=0.004)&(x<0.005)]<-"#00FE00" > color[(x>=0.005)&(x<0.006)]<-"#00F700" > color[(x>=0.006)&(x<0.007)]<-"#00E400" > color[(x>=0.007)&(x<0.008)]<-"#00D600" > color[(x>=0.008)&(x<0.009)]<-"#00C300" and so on but I don't like to do it > manually... do know a solution... > Thank you very much > chris > Hi Chris, You can transform the numeric values in "Height" into colors using the color.scale function in the plotrix package. The color.legend function will allow you to get your legend.
Jim ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.