How do I curve fit a specific non-linear function which passes through 2 fixed points?

I have a set of data points and a curve with 10 parameters. How do i fit in these parameters with the constraint that this curve must always pass through 2 fixed points? Thanks :D

Answer 1

[Robert U]

Hello Anantha Narayanan Suresh Babu:

The question has been raised already. You can find the question and answers here:

https://de.mathworks.com/matlabcentral/answers/94272-how-do-i-constrain-a-fitted-curve-through-specific-points-like-the-origin-in-matlab

If your target function is polynomial you might want to try "polyfix" from File Exchange:

https://de.mathworks.com/matlabcentral/fileexchange/54207-polyfix-x-y-n-xfix-yfix-xder-dydx-

If you have a custom function you might look into fmincon and formulate an optimization problem:

https://de.mathworks.com/help/optim/ug/fmincon.html

Kind regards,

Robert