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seen Mar 17 at 21:15

Mar
17
comment Optimizing the fitting of Ordinary Differential Equation(NDsolve) involving interpolation functions
Hey, anyone interested in this problem. Just a update, I finally solved the problem in IGOR, which has a better solution for fitting ODE.
Jan
17
comment Optimizing the fitting of Ordinary Differential Equation(NDsolve) involving interpolation functions
Hi, I have uploaded my files (data file and NB file) here . The uploaded NB file has a slightly more complicated ODE, but the basic idea is still identical.
Jan
17
comment Optimizing the fitting of Ordinary Differential Equation(NDsolve) involving interpolation functions
Hi Firstly, thank you very much for your attention on my problem. Secondly, I feel myself stupid enough being not able to find any file upload button here. Can you leave me you email addr so that I can send data file and my NB file. Thanks
Jan
17
comment Optimizing the fitting of Ordinary Differential Equation(NDsolve) involving interpolation functions
I just tried to use the solution from DSolve. But it take even longer time to do the integral for interpolation function. It seems that the interpolation function is always pain for numerical analysis. I probably will switch to matlab or IGor by manually solving the ODE via Runge-Kutta method.
Jan
16
comment Optimizing the fitting of Ordinary Differential Equation(NDsolve) involving interpolation functions
Hi, thanks for this idea. It seems to use DSolve to replace NDSolve. However, I tried it in my notebook and it fails to execute, probably due to that DSolve has difficulty to handle interpolation function.
Jan
16
revised Optimizing the fitting of Ordinary Differential Equation(NDsolve) involving interpolation functions
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Jan
16
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Jan
16
revised Optimizing the fitting of Ordinary Differential Equation(NDsolve) involving interpolation functions
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Jan
16
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Jan
16
revised Optimizing the fitting of Ordinary Differential Equation(NDsolve) involving interpolation functions
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Jan
16
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Jan
16
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