[R] Single Title for the Multiple plot page

[Mohammad Ehsanul Karim]

Dear List, 

In R we can plot multiple graphs in same page using
par(mfrow = c(*,*)). In each plot we can set title
using main and sub commands. 

However, is there any way that we can place an
universal title above the set of plots placed in the
same page (not individual plot titles, all i need is a
title of the whole graph page) as well as sib-titles?
Do I need any package to do so?

Thank you for your time.

Mohammad Ehsanul Karim (R - 2.3.1 on windows)
Institute of Statistical Research and Training
University of Dhaka