You might find the ggplot mailing list a friendlier place to ask questions about ggplot2. Hadley
On Wed, Dec 21, 2011 at 2:16 PM, rachaelohde <cox.rach...@gmail.com> wrote: > Hello, > > I am trying to plot means and standard errors conditioned by a factor, using > qplot. I am successful at getting the bar graph I want with a error bar, > however I have tried many things and cannot get the bars to change colors. > Currently showing as red and blue, but need it to be black and white for > publication. Any suggestions please? > > Using a data set June, which is str: > 'data.frame': 21 obs. of 6 variables: > $ BLCK : Factor w/ 4 levels "","B","I","W": 3 4 2 3 2 2 2 4 3 4 ... > $ PLOT : int 3 3 6 1 2 5 1 1 2 2 ... > $ TRT : Factor w/ 5 levels "","crop","ten",..: 2 2 2 3 3 3 4 4 4 5 ... > $ Date : Factor w/ 8 levels ""," 6/16/11",..: 2 2 2 2 2 2 2 2 2 2 ... > $ habitat : Factor w/ 3 levels "","C","P": 2 2 2 2 2 2 2 2 2 2 ... > $ Abundance: num 0.333 0 1.333 0 1.667 ... > > Current code is: > > Ab.avg<-ddply(June, c("TRT", "habitat"), function(df) > return(c(Ab.avg=mean(df$Abundance), Ab.sd=sd(df$Abundance)))) > > avg.plot<-qplot(TRT, Ab.avg, fill=factor(habitat), > data=Ab.avg, geom="bar", position="dodge") > > dodge <- position_dodge(width=0.9) > avg.plot++geom_linerange(aes(ymax=Ab.avg+Ab.sd, ymin=Ab.avg-Ab.sd), > position=dodge)+theme_bw() > > http://r.789695.n4.nabble.com/file/n4223035/june_bar_graph.png > > Also, would like to plot 4 of these bar graphs (for four dates) on the same > screen, I cannot get the par() or layout() function to work with qplot. Is > there another way? > > Thank you! > > -- > View this message in context: > http://r.789695.n4.nabble.com/black-and-white-in-qplot-layout-4-graphs-in-one-screen-tp4223035p4223035.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/ ______________________________________________ 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.