@mois 

Great solution, but sorry, where I have to add this option. TO DataFit or to PDE?

Could you outline the commands please, I am still novice in Maple.

Thanks a lot!

Walter

PS: I found it out myself, Just add the term option remember in the PDE after the proc().

THanks a lot for this great solution!

BTW the results are the same.

@mois 

Great solution, but sorry, where I have to add this option. TO DataFit or to PDE?

Could you outline the commands please, I am still novice in Maple.

Thanks a lot!

Walter

PS: I found it out myself, Just add the term option remember in the PDE after the proc().

THanks a lot for this great solution!

BTW the results are the same.

@Markiyan Hirnyk 

Thanks, is there a way to let it run faster? Like mine SSE but I want to use directsearch's DataFit.

Walter

@Markiyan Hirnyk 

Thanks, is there a way to let it run faster? Like mine SSE but I want to use directsearch's DataFit.

Walter

Dear mois,

thanks a lot for your sophisticated answer.

So when I use F for the datafit fn I got 80time faster the result. Do I understand it correctly?

I mean, how can I use your datafit fn instead of my SSE? (But I want again to calculate H only ONE TIME for all 80pkts) Is there a way?

Your Package is really great!

Best regards

Walter

Dear mois,

thanks a lot for your sophisticated answer.

So when I use F for the datafit fn I got 80time faster the result. Do I understand it correctly?

I mean, how can I use your datafit fn instead of my SSE? (But I want again to calculate H only ONE TIME for all 80pkts) Is there a way?

Your Package is really great!

Best regards

Walter

Thanks you, hirnyk! Yes I found that a expression can export to MML but only for displaying. I also think there is no way to translate the Maple to MMA. Thanks anyway.

PS: I wanted to convert the DirectSearch Module and the Worksheet (saved as mws from version 13)

DirectSearch_v1.mws  and  my ws using DS:_ GroundWater_Solutio.mws But even I found http://library.wolfram.com/infocenter/MathSource/188/ I could not translate it successfully. Advices are welcome. I even tried to include the modul into the worksheet but without success. DirectSearch_v1_ful.mws

Thanks you, hirnyk! Yes I found that a expression can export to MML but only for displaying. I also think there is no way to translate the Maple to MMA. Thanks anyway.

PS: I wanted to convert the DirectSearch Module and the Worksheet (saved as mws from version 13)

DirectSearch_v1.mws  and  my ws using DS:_ GroundWater_Solutio.mws But even I found http://library.wolfram.com/infocenter/MathSource/188/ I could not translate it successfully. Advices are welcome. I even tried to include the modul into the worksheet but without success. DirectSearch_v1_ful.mws

Dear Robert,

thanks but here K(t) is a peak where the slope of the first line is infinite. I would really have that slope of the beginning line and the slope of the falling line.

Dear Robert,

thanks but here K(t) is a peak where the slope of the first line is infinite. I would really have that slope of the beginning line and the slope of the falling line.

Dear Robert,

thank you very much for that result. But I want to define a function (t) which has that shape. It does not work here:

Download GroundWater_Solution.mw

Walter

Dear Robert,

thank you very much for that result. But I want to define a function (t) which has that shape. It does not work here:

Download GroundWater_Solution.mw

Walter

Dear expert,

thanks a lot for this highly sophisticated solution. I tried the fitting in MathCad, but without success.

Great work - I can improve and learn a lot!

Thanks a lot

Walter

Dear expert,

thanks a lot for this highly sophisticated solution. I tried the fitting in MathCad, but without success.

Great work - I can improve and learn a lot!

Thanks a lot

Walter

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