[R] main title in multi-plot

[Henrik Andersson]

Use par(oma) for outer margins and then title with outer=TRUE or mtext 
in the same way.

x<-1:100
y<-x
z<-y/x
w<-exp(z)

par(oma=c(0,0,2,0))
par(mfrow=c(2,2))
plot(y~x)
plot(z~x)
plot(w~x)
plot(z~w)
title(main="Main title",outer=T)

- Henrik

Milton Cezar Ribeiro wrote:
> Dear R-gurus,
>
> I need to print several plots into a graphic device and I would like to print out a main title.
> My code looks like 
>
> x<-1:100
> y<-x^2
> z<-y/x
> w<-exp(z)
> par(mfrow=c(2,2))
> plot(y~x)
> plot(z~x)
> plot(w~x)
> plot(z~w)
>
> Kind regards,
>
> miltinho
> Brazil
>
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