fminsearch to fit data

how I can pass two varibales and 2 euqations to fit using fminsearch

fminsearch(@(a,c) opt(a,c,x,y),[1,1])

I'm getting below error

>> fminsearch(@(a,c) opt(a,c,x,y),[1,1])

Not enough input arguments.

Error in @(a,c)opt(a,c,x,y)

Answer 1

[Walter Roberson]

You cannot pass two variables and two equations to fit to fminsearch()

fminsearch() can work with a vector of variables, but only with one equation.

Your example only shows one function being passed to fminsearch() . You can handle the pair of variables like this:

fminsearch(@(ac) opt(ac(1), ac(2), x, y), [1, 1])

opt() will be responsible for returning a scalar value.

[MOH]

thank you