Thank you for your replies. I figured out that curve has an option of add
which adds it to a previously existing graph.

Thank you,
Amit

On Fri, May 9, 2008 at 10:07 AM, Amit Soni <[EMAIL PROTECTED]> wrote:

> Hi,
>
> I have a histogram of an array of numbers.
> hist(v,10)
>
> How can I plot a function, say a semi circle,
> curve(sqrt(2.25-x*x), -1.5,1.5)
> in the same graph?
>
> Thank you
>

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