I am in a plane to the google mentors summit, I'll reply in a day or
two when I get a decent net connection. Ondrej

On 10/22/08, Pekeika <[EMAIL PROTECTED]> wrote:
>
> Ondrej, Many thanks for your answer!
>
> Yes I need to do a definite integral but I noticed that the exp(poly)
> integration is not yet implemented in Sympy and yes I need to
> implement it, but I'm an engineer not a mathematician, I would
> appreciate your help very much... my function that I need to integrate
> is a lot more complex, it is the product of likelihood functions that
> have all exponential shape, and the lambda parameter of these
> exponentials is a Gaussian expression each... In that Gaussian are 4
> parameters which are my integration space (I need to do partial,
> definite integration respect to each of them).
>
> It looks like the following:
>
> Integral{[lambda1*exp(-lambda1*c1)]*[lambda2*exp(-
> lambda2*c2)]*...*[lambdan*exp(-lambdan*c3)]} dv d(phi) dg dD
>
> in which ci, xi, yi and ti are constants, and each lambda is 1/
> Gaussian, with parameters v, phi, g and D:
>
> lambdai=1/{(g/(4.00*pi*D*ti))*(exp(((-(xi-(v*ti*cos(phi)))**2.00)+(-
> (yi-(v*ti*sin(phi)))**2.00))/(4.00*D*t)))}
>
> Everything is integrating but the exp() parts are not... could you
> please acommodate the patch in the link provided to try solve this? or
> please give me hints to try myself...
>
> Thanks!!
> Pekeika.
>
> >
>

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