An example of a function that takes another function as an argument.

<code>

function r = vectoreval(f,x);

  N = length(x);
  r = zeros(N,1);
  for i=1:N
    r(i) = f(x(i));
  end

end
</code>

You can call this function in Matlab with the syntax

<code>
x = linspace(0,pi,100);
s = vectoreval(@sin, x);
</code>