[R] get mean from cdf

[Bert Gunter]

Sigh....
Homework?

-- Bert

On Thu, Sep 8, 2011 at 6:47 PM, annie Zhang <annie.zhang2010 at gmail.com> wrote:
> Hi All,
>
> How can I get the expected value from a discrete cdf? Is there any R
> function that can do this?
>
> Thanks,
> Annie
>
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