How to reduce number of parameters in MATLAB anonymous function?

Question

How is it possible to reduce the number of parameters in an anonymous function in MATLAB? Here is an short example:

f = @(p,x) p(1).*x.^2 + p(2);
p = [1,2];
g = @(x) f(p,x);

So long this works fine. But I would like to export the final function with all parameters to a string.

string = func2str(g);

The result is @(x) f(p,x) but in my mind it should be something like @(x) 1.*x.^2 + 2.

How is it possible to realize this?

Daniel · Accepted Answer · 2013-12-04 00:55:42Z

2

You may use the symbolic math toolbox to simplify:

function h = cleanhandle(f)
    syms x;
    h = matlabFunction(f(x));
end

Usage:

>> g2 = cleanhandle(g)
g2 = 
    @(x)x.^2+2.0

Here a version for functions with more than one input argument:

function f=cleanhandle(f)
    n=nargin(f);
    A=sym('A', [n 1]);
    A=mat2cell(A,ones(n,1));
    f=matlabFunction(f(A{:}));
end

answered Dec 3, 2013 at 11:34

Daniel

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