Thanks All! I combine your answers and post the code here again, if later somebody need it.
Actually, what I want is: > x1 [1] 1 2 10 > x2 [1] -3 5 -8 > barplot(x1,col="white",border="red") > barplot(x2,col="white",border="green",add=T) So that, the two plots even share the same x-axis. But, It comes another question: > barplot(x2,col="white",border="green",add=T), because there are 2 numbers are negative, some part of the bar is missing. Is there any automatic function to make the axes fit very well for both bars? And, suppose I want to add another command: axis(1, 0:20) to draw x-axis. I notice it increase like: 0,1,2,3,...20; how can I make it 0,5,15,20? Thanks! On 2/22/06, Gabor Grothendieck <[EMAIL PROTECTED]> wrote: > > The barplot solution already presented is probably what you want > but just in case here is a zoo solution: > > library(zoo) > z <- merge(zoo(x2), zoo(x1, seq(x1)+.5)) > plot(z, type = "h", plot.type = "single", col = 1:2, lwd = 5) > > Or a similar solution without zoo: > plot(c(x1, x2) ~ c(seq(x1)+.5, seq(x2)), > col = c(1+0*x1, 2+0*x2), type = "h", lwd = 5) > > > On 2/22/06, jia ding <[EMAIL PROTECTED]> wrote: > > Hello, > > > > I have a very simple question about "2 barplots in the same graph". > > > > It seems quite easy, but I searched google for long time, haven't find > > solution. > > > > For example, I want one graph like: > > x1=seq(0,2,by=0.3) > > x2=seq(3,0,by=-0.1) > > barplot(x1,col="red") > > barplot(x2,col="green") > > > > It means if it's on the same graph, some bars are overlaped. > > So if the bars are hollow, instead of filled with color, it will be > better. > > > > Actually, I think it's something similar with matlab's "hold on" > command. > > > > Thanks! > > > > Nina > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@stat.math.ethz.ch mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > > > [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
