Look at the twoord.plot function in the plotrix package, but be sure to read the note on the help page, then reread it and take its advice if you decide to stick with this type of plot.
-- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Rodrigo Aluizio > Sent: Thursday, December 09, 2010 9:44 AM > To: R Help > Subject: [R] Barplot with "Independent" Lines Y axis > > Hi list. I'm plotting pluviometric (Rain) data as a barplot, and then > adding > the salinity variable to this plot as lines. Obviously as these Y > scales are > completely different the salinity appears at the lower part of the > graph > extremely compacted. I need to plot the line at the exactly same area > of the > barplot but with its own Y axis (at the right), so the salinity can use > the > plot area freely. I tried the par(new=T), but it only works for high > level > plot functions (not for lines or points). > > Below are some example data and the code I'm using: > > Month Rain Salt > Fev 365.6 13 > Mar 235 18 > Abr 115.1 18 > Mai 47.4 18.75 > Jun 112 15 > Jul 156.8 17 > Ago 66.1 15 > Set 149.8 14 > Out 167.1 11.5 > Nov 269.3 17.5 > > mp<-barplot(Dados$Rain,names.arg=rownames(Dados),ylab='Pluviosidade > (mm)',width=0.5,ylim=c(0,370),yaxp=c(0,370,10)) > lines(mp,Dados$Salt,type='b',pch=19,lty='dotted') > > Any ideas? > > Thank you for the attention. > > Regards > > ------------------------------------------------------------------- > MSc. Rodrigo Aluizio > Centro de Estudos do Mar/UFPR > > ______________________________________________ > 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.
