Hi! Just use your factors for indexing c(15,16,17) and c("red","green","blue"). So, with the iris data:
>with(iris, plot(Sepal.Length, Sepal.Width, pch=c(15,16,17)[as.integer(Species)], col=c("red","green","blue")[as.integer(Species)] )) Best regards, Kyosti Kurikka > > Evgeniy Kachalin wrote: > > > >> Hello, dear participants! > >> > >> Could you tip me, is there any simple and nice way to build > >> scatter-plot for three different types of data (, and o and * - signs, > >> for example) with legend. > >> > >> Now i can guess only that way: > >> > >> plot(x~y,data=subset(mydata,factor1=='1'), pch='.',col='blue') > >> points(x~y,data=subset(mydata,factor1=='2'), pch='*',col='green') > >> points(.... etc > >> > >> What is the simple and nice way? > >> Thank you very much for your kindness and help. > >> > > > > > > Example: > > > > > > with(iris, > > plot(Sepal.Length, Sepal.Width, pch = as.integer(Species))) > > with(iris, > > legend(7, 4.4, legend = unique(as.character(Species)), > > pch = unique(as.integer(Species)))) > > > > Uwe, sorry for my stupid question. You mean that when pch=factor , plot > can recycle the factor and use it for subscripts or marks. > > Then pch=as.integer(Species) results in c(1,2,3) for 3 factor levels. > And I need symbols 15,16,17 and colors red, blue, green. > > So then I do: > iris$Species->spec.symb > iris$Species->spec.col > levels(spec.symb)<-c(15,16,17) > levels(spec.col)<-c('red','green','blue') > > That's the only way? > More of that!!! 'Plot' does not like factors in 'pch'. So it must be so: > plot(x~y,data, pch=as.integer(as.character(spec.symb))). > That's totally crazy... > > -- > Evgeniy > > ______________________________________________ > 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 > > ______________________________________________ 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