[R] How to add a common title (or xlab, ylab) for multi-plots in the same window?

[Sundar Dorai-Raj]

F Duan wrote:

> Dear R people,
> 
> I am using par(mfrow=c()) to plot multi-figures in the same window. And I like 
> to put a common title (and xlab, ylab) for all of plots. I have already left 
> some margin by resetting omi values in par() and hided all (xlab, ylab) for 
> each sub-plot. Could anyone tell me how to do that?
> 
> Thanks a lot,
> 
> Frank
> 

?mtext allows this if outer = TRUE.

--sundar