Hilbert Curve

Hi I'm trying to plot this:

function [x,y]=hilbert(n);
%HILBERT Hilbert curve.
%
% [x,y]=hilbert(n) gives the vector coordinates of points
%   in n-th order Hilbert curve of area 1.
%
% Example: plot of 5-th order curve
%
% [x,y]=hilbert(5);line(x,y)

 n=5
if n<=0
  x=0;
  y=0;
else
  [xo,yo]=hilbert(n-1);
  x=.5*[-.5+yo -.5+xo .5+xo  .5-yo];
  y=.5*[-.5+xo  .5+yo .5+yo -.5-xo];
end

Which I got from here: http://www.mathworks.com/matlabcentral/fileexchange/4646-hilbert-curve

However I get this error message

??? Maximum recursion limit of 500 reached. Use set(0,'RecursionLimit',N) to change the limit. Be aware that exceeding your available stack space can crash MATLAB and/or your computer.

Error in ==> hilbert

Anyone know how to fix this?

Everyone on the page the file is posted on says it works well but sadly I cannot get it to run.

[Sean de Wolski]

What did you call it with? Did you insert the overwriting of the input argument n, with n=5

?

Answer 1

[Walter Roberson]

Sean is right, the problem is that n keeps getting bashed back to 5, so the recursion never ends.

He is also right to hint that it might be due the way you call it. In order to use it, you should not have that n=5 line, and you should not just press F5 when you are on the file: instead, at the command line, you should command

hilbert(5)

if what you want is the 5th order curve.

[George Harrison]

Ahh I see, I was being foolish :) Thanks for the Help