Using surf with two-dimensional function handle argument

How might I use meshgrid and surf to plot a surface of a two-dimensional function handle?

So instead of f(x1,x2), f(x) when x=[x1 x2]

f =@(x1,x2) x1.^2 + x2.^2;
t = linspace(-10,10,20);

[xx,yy] = meshgrid(t,t);
surf(xx,yy,f(xx,yy))

Answer 1

[Walter Roberson]

f =@(x) x(1).^2 + x(2).^2;
t = linspace(-10,10,20);
[xx,yy] = meshgrid(t,t);
surf(xx,yy,arrayfun(@(x,y)f([x,y]),xx,yy))