Dear Tony, >From ?scatterplot:
"reset.par: if TRUE then plotting parameters are reset to their previous values when scatterplot exits; if FALSE then the mar and mfcol parameters are altered for the current plotting device. Set to FALSE if you want to add graphical elements (such as lines) to the plot." I hope this helps, John > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Tony Laidig > Sent: May-01-09 4:14 PM > To: r-help@r-project.org > Subject: [R] Plotting extra lines on scatterplot > > Hello Everyone- > I'm in the process of slowly learning R and am having a little bit of > trouble plotting an extra line onto a scatterplot. I'm sure the answer > is quite simple but I am stumped. > > The code I am using is: > > headways <- read.table("headways.csv", header=TRUE, sep=",", > na.strings="", dec=".", strip.white=TRUE) > plot.new() > scatterplot(dechway~dechr, reg.line=FALSE, smooth=TRUE, labels=F, > boxplots='y', span=0.5, xlab="Time", ylab="Headway", ylim=c(0,9), > data=headways) > lines(headways$dechr, headways$schedule) > > A subset of the dataset I'm working with is at > http://web.mit.edu/c64/www/headways.csv . > > The extra line, plotted with lines(), should be right at 4, but is > actually below where it should be. I assume that I'm using the wrong > function to plot this line, as there are many ways to do it, but have > not the experience to know which function is appropriate to use with > scatterplot(). > > Thank you for all of your help. > -Tony > > ______________________________________________ > 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. ______________________________________________ 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.
