On Fri, 15 May 2009 15:43:33 +0200 Peter Menzel <pmen...@googlemail.com> wrote:
PM> scatterplot(data[,2] ~ data[,1], PM> data=data,smooth=F,reg.line=F,xlim=c(0.5,1),ylim=c(0.5,1),ylab="ML",xlab="Freq",cex.lab=1.9,cex.axis=1.8) Side remark: you don't need do data[,2] if you have specified data=data as you did. So var1~var2 would be enough. PM> after that, I draw one line with abline(0,1,col="gray20") which PM> works perfectly fine. abline for me also does not work in the expected way, see below. PM> now I want to add, say the point (0.6,0.6) to the plot with PM> points(c(0.6),c(0.6)). the c() is not necessary points(0.6,0.6) is enough. PM> The point is plotted, but not exactly at the proper coordinates, but PM> at something like (0.55,0.55). That seems to be a bug. The axis seems not to be drawn exactly. to replicate see: library(car) data<-data.frame(x1=rnorm(100),x2=rnorm(100,.25)) scatterplot(x1~x2,data=data,ylab="ML",xlab="Freq") points(0.5,0.5,col="blue") abline(h=0.5,lty=2) # check whether point is at the correct location. abline(v=0.5,lty=2) abline(h=1) # line is not at 1 at the y-axis! So maybe one can contact the package owner? Btw. creating such a plot by yourself is easy, have a look at ?layout ?axis Stefan ______________________________________________ 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.