[S] Q: plotting multiple graphs of different sizes on one page

["Raphael Kuznetsovski" <rkuznetsovski@lan813.ehsg.saic.com>]

Dear S+users,

Using par(mfrow=c(m,n)) I can create m*n plots
of equal sizes on the same page.
With mfrow=c(2,1), for example, I will get
two plots each covering 50% of the plotting area.
Is there a way to change the default sizes of 
these plots?
For example, what should I do to generate 
two plots on one page so that the first plot
would cover 75% of the plotting area and 
the second plot would cover the rest (25%)?

Raphael Kuznetsovski
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