Two functions in the same file causing error: "Maximum recursion limit of 500 reached"

I have the following function file.

function y=myfun(x)
y=2*x;
if any(y<0)

      positive(x);
      y=myfun(x);
  end
  end
  function x=positive(x)
  y=myfun(x);
  idx=find(y<0);
  x(idx,1)=-x(idx,1);
  % y=myfun(x);
  end

I want to give a matrix for example x=[-2;2]; and calculate y=2*x; If the any of y is negative i would like to change the x such that y is always positive.

The problem is mostly due to control flow but I cannot solve it. Can you help me?

Answer 1

[Iain]

The simplest answer is to set: y = 2 * abs(x);

If you do that, you don't need to recursively call the function.