calling a function with lsqnonlin

I'm attempting to call minimize the value of a function (chi2) using lsqnonlin as shown below

[fitpar,resnorm01,residual]=lsqnonlin(chi2,inpar,lb,ub,options);

the chi2 function works, but i get the following error ??? Error using ==> lsqfcnchk at 111 FUN must be a function, a valid string expression, or an inline function object.

it works when using the function handle @ (as shown below) [fitpar,resnorm01,residual]=lsqnonlin(@chi2,inpar,lb,ub,options);

but when I use the function handle i can't provide additional inputs to the function, i.e. @chi2(x,y,z) which would greatly simplify things downstream. Any advice?

Answer 1

[Sean de Wolski]

@(x,y,z)chi2(x,y,z)

You need to explictly declare the inputs. If there are none, leave it empty:

@()chi2(x,y,z)

For more info:

doc function_handle

[Sulakshan Arya]

I am using fsolve command to solve nonlinear equation through Simulink MATLAB function.

If i use fsolve(@myfun,x0) i get Error using ==> "function handles are unsupported for MATLAB calls", and if i use fsolve(myfun,x0) i get Error using ==> lsqfcnchk at 111 FUN must be a function, a valid string expression, or an inline function object.

Any solution???