MATLAB: Inner product (the result is out of the control)

inner product

Thank you so much for your attention for my question, the following is my code:
    % function responsenum = numresponse(num)
      switch num
             case 1
                  responsenum=@(x,y)x+y;
             case 2
                  responsenum=@(x,y)x+y;
     function y = innerprod(fun1,fun2)
     y = @(x,y)fun1(x,y).*fun2(x,y);
     x = -1:0.1:1;y = -1:0.1:1;
     metag = @(x,y)innerprod(numresponse(1),numresponse(2))
     z = metag(x,y);
In my opinion, variable z should be a matrix, but it is a function, could you give me some help about this problem, i will be very appreciated for your kindness!

Best Answer

You are getting confused because you are putting a function (returned by innerprod) inside another function (which you call metag), but you don't need to nest them at all! What you need is to simply call this:
metag = innerprod(numresponse(1),numresponse(2));
z = metag(x,y);
because innerprod already returns a function, there is no point in you sticking it inside another function.
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