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matlabfminsearch

Passing a constant to fminsearch

How can I pass a constant to fminsearch? So like, if I have a function:

f(x,y,z), how can I do an fminsearch with a fixed value of x?

fminsearch(@f, [0,0,0]);

I know I can write a new function and do an fminsearch on it:

function returnValue = f2(y, z)

returnValue = f(5, y, z);

...

fminsearch(@f2, [0,0]);

My requirement, is I need to do this without defining a new function. Thanks!!!

Solution

  • You can use anonymous functions:

    fminsearch(@(x) f(5,x) , [0,0]);

    Also you can use nested functions:

    function MainFunc()
    z = 1;
    res = fminsearch(@f2, [0,0]);

    function out = f2(x,y)
        out = f(x,y,z);
    end
end

    You can also use getappdata to pass around data.