Dear Fabrice Tourre,
Re: > John Kane, > > Thanks. It makes some of sense. But it seems not exactly what I want. > I just remember it need using mtext and adjust margin. I saw such of > example long time ago, but I have forgotten it. (etc...) Maybe this is what you're after? Fiddled a bit with the margins: a<- rnorm(1000,0,1) b<-rnorm(1000,0,2) c<-rnorm(1000,0,3) d<-rnorm(1000,0,4) quartz(w=6,h=8) par(mfrow=c(2,2)) #par(mai=c(1,0,1,1)) par(mar=c(3,2,4,1)) #par(plt=c(1.1,1.1,1.1,1.1)) tlin=2 hist(a) mtext("A",3, line=tlin, adj=0, cex=2) hist(b) mtext("B",3, line=tlin, adj=1, cex=2) hist(c) mtext("C",3, line=tlin, adj=0, cex=2) hist(d) mtext("D",3, line=tlin, adj=1, cex=2) Hope this helps, Best regards, Franklin Bretschneider -- Dept Biologie Kruytgebouw W711 Padualaan 8 3584 CH Utrecht The Netherlands ______________________________________________ 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.