equivalent of fsolve in MATLAB

Hi,

I need to solve a non-linear problem, but I don't have the toolbox optimisation. Can you help find an other way??

Thanks

[Star Strider]

Context — http://www.mathworks.com/matlabcentral/answers/239444-fsolve-undefined-function-fsolve-for-input-arguments-of-type-function_handle

Answer 1

[Alan Weiss]

It depends on how many variables you have. If you have one unknown in a nonlinear function, you can use fzero. If you have more than one unknown, then you can try fminsearch on the sum of squares of your function values. But this might fail. Try starting at a variety of points to have a better chance of finding a solution.

Good luck,

Alan Weiss

MATLAB mathematical toolbox documentation

Answer 2

[Matt J]

There are a number of nonlinear least squares solvers on the File Exchange. Browse for your favorite:

http://www.mathworks.com/matlabcentral/fileexchange/?utf8=%E2%9C%93&term=nonlinear+least+squares