On Sun, 9 Nov 2008, Yan (Daniel) Zhao wrote:

Suppose I have a function f(x) (say, f(x)=exp(sin(x)),  how do I find the
number y such that the integral of f(x) on the interval of (-infinity, y) is
equal to a specified number, say, .8?

Thanks,
Yan


See ?uniroot

David Scott

_________________________________________________________________
David Scott     Department of Statistics, Tamaki Campus
                The University of Auckland, PB 92019
                Auckland 1142,    NEW ZEALAND
Phone: +64 9 373 7599 ext 86830         Fax: +64 9 373 7000
Email:  [EMAIL PROTECTED]

Graduate Officer, Department of Statistics
Director of Consulting, Department of Statistics

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