Error reading in function file

gistfile1.matlab

function [x, y] = graph (varargin)
	list = varargin{1};	
	for i = 2:length(varargin)
		cat(1, list, varargin{i});
	endfor

	x = list(1:rows(list), 1);
	y = list(1:rows(list), 2);
	x = cat(1, x, x(1));
	y = cat(1, y, y(1));

	axis([0 100 0 100], "manual", "tic", "square", "equal", "xy");
	plot(x, y);
endfunction

octave:60> graph(A,B,C)
ans =

   6.1232e-17
   6.1232e-17

octave:61> A
A =

   0.00000   1.00000   0.00000   1.00000

octave:62> B
B =

   0.86603  -0.50000   0.00000   1.00000

octave:63> C
C =

  -0.86603  -0.50000   0.00000   1.00000

octave:64> graph(A,B,C)
ans =

   6.1232e-17
   6.1232e-17