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.