MATLAB least square non-linear curve fit

rational curve fit matlab

Hi friends,

I have hit a brick wall while working with the least square curve fitting function "lsqcurvefit". I am getting an error which I dont have a clue what it means. The error reads "Function value and YDATA sizes are incommensurate".

Does anyone have some idea on how to avoid this. I am in desperate need of some help on curve fitting. I have a function z which is complex and is dependant on two variables x and y which are also complex. In the rational function equation I have some real coefficients as well which I need to determine. I have z, x and y and want to write a small program which would let me compute the various coefficients of the rational function.

I would appreciate it if someone could send me a relavant example or suggestion.

Thanks,
Kash.

least square curve fit matlab

Hi

Please check this book:

Or search for other books in forum.
The one at the link is dedicated to Matlab and numerics.

Good luck

Cl