Dear Katherine, The plotMeans function in the Rcmdr package isn't intended to do what you want (in fact, I'd argue that in most cases it isn't desirable to plot means in a bar graph), but R graphics are very flexible and it wouldn't be hard to make the plot that you describe. I'd start with barplot() to draw the bar graph, and then add the error bars, probably using arrows().
If you haven't done so already, you might want to read something about using R graphics -- such as a general book on R or Paul Murrell's book on R Graphics. BTW, using the Rcmdr for statistics shouldn't be much slower (in execution, anyway) than entering commands directly, since the Rcmdr just causes commands to be executed. I hope this helps, John -------------------------------- John Fox, Professor Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604 http://socserv.mcmaster.ca/jfox -------------------------------- > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Katherine Jones > Sent: Wednesday, October 24, 2007 9:00 AM > To: [EMAIL PROTECTED] > Subject: [R] rcmdr and mailing lists > > I am trying to draw a bar chart with standard error bars for > two groups. I was struggling in R so have now managed to get > rcmdr up and running on my mac (although the help frequently > crashes, everything else seems fine, if a bit sluggish; > wouldn't use it for stats). This has allowed me to very > easily create a plot of the means and standard errors > > BUT-does anyone know if it is possible to get rid of the > connect line between the means and to add bars to the chart? > > I'm generally happy with doing stats in R but currently lack > a package to draw very simple bar charts of means for my > behavioural data; I have a mac and not much site licensed software. > > Thanks for everyones help so far, > > Dr Katherine Jones > Department of Biology, > Carleton University > > ______________________________________________ > 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.
