boxplot does not use the actual values of aa as x-value, but considers aa as a factor having three levels.
Try bxp <- boxplot(bb~aa, data=nn) bxp to see what the boxplot actually is. For your lines you should also use three levels. aa2<-c(1,1,1,1,2,2,2,2,3,3,3,3,3,3,3) points(cc~aa2) (after you have been correcting your example code...) Joris Lanre Okusanya wrote: > I am trying to make a box plot and overlay it with a scatter plot from > another data.frame. I was able to successfully create the boxplot, but > when i tried using points(x~y...) the dots did not show up. > > example code > > aa<-(300,300,300,300,600,600,600,600,900,900,900,900) > bb<-(13,12,14,11,56,44,34,75,22.,34,22,98,59,55,56) > cc<-(13,12,14,11,56,44,34,75,22.,34,22,98,59,55,56) > nn<-data.frame(aa,bb) > mm<-data.frame(aa,cc) > boxplot(bb~aa, data=nn) > lines(cc~aa, data=cc) > > Any help with example code is appreciated. > > Thank you. > > Lanre > > ______________________________________________ > 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. confidentiality notice: The information contained in this e-mail is confidential and...{{dropped}} ______________________________________________ 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.