Thanks, but the problem is a little bit more difficult.

I want to use this PDE solution to get the systemparameters pm,pmi and Dm by means of non-linear curve fitting. The data are in teh XY matrix. But how can I define and solve the PDE with the 3 parameters? See the paper at SOIL_Example_Boo.pdf The data are here: GroundWater_fit.mw

Thanks a lot!

Walter

Dear Robert,

how can the timestep be defined? (sorry, I just saw it ) Your sheet is now clear. Do I understand it correctly that at t0 there is a pole?

Thks

walter

Dear Robert,

how can the timestep be defined? (sorry, I just saw it ) Your sheet is now clear. Do I understand it correctly that at t0 there is a pole?

Thks

walter

Dear expert,

thanks a lot. I see you intergrate from the one side only. So you do not fall into the gap.

Do you know if in Mathematica 7.01 there would be also such a function Heaviside?

Finally I want to run my problem in Mathematica. Hope this is possible.

walter

Dear expert,

thanks a lot. I see you intergrate from the one side only. So you do not fall into the gap.

Do you know if in Mathematica 7.01 there would be also such a function Heaviside?

Finally I want to run my problem in Mathematica. Hope this is possible.

walter

Dear Douglas,

thanks a  lot for your help. Now I know some basics for Maple. And even in MMA it could be solved.

Greetings

Walter

Dear Douglas,

thanks a  lot for your help. Now I know some basics for Maple. And even in MMA it could be solved.

Greetings

Walter

thank you very much, Acer. So easy when you know how.

thank you very much, Acer. So easy when you know how.

Thanks a lot, but this might be local minimum. As I have some other results.

Walter

Thanks a lot, but this might be local minimum. As I have some other results.

Walter