[R] Main Title for multiple charts

[Laura Holt]

Hi R !

I have the following set up:

>par(mfrow=c(2,2))
>curve(dexp,from=0,to=5)
>hist(z1,main="Size 5")
>hist(z2,main="Size 15")
>hist(z3,main="Size 30")
>

I would like to put a title at the very top of the page that ties the theme 
of all the charts
together.  How would this be done, please?

Thanks in advance!

Laura Holt
mailto: lauraholt_983 at hotmail.com

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