Unable to plot iterated function system

I'm trying to plot an iterated function system based on the Barnsley Fern. The fractal is started at point (0,0) and generates new points by using 4 transformations. I received several errors and an empty graph. Any suggestions on how to go around this. I'm new to MATLAB and thanks for any help.

Errors

Graph

Answer 1

[Torsten]

function Modern_Art
  A{1} = [1;2];
  n = 100;
  r = rand(100,1);
  for i=1:100
    if r(i)<0.01
        A{i+1} = [0 0;0 0.16]*A{i};
    elseif 0.01 <= r(i) && r(i) < 0.86
        A{i+1} = [0.85 0.04;-0.04 0.85]*A{i} + [0;1.6];
    elseif 0.86 <=r(i) && r(i) < 0.93
        A{i+1} = [0.2 -0.26;0.23 0.22]*A{i} + [0;1.6];
    elseif 0.93 <= r(i) && r(i) < 1
        A{i+1} = [-0.15 0.28;0.26 0.24]*A{i} + [0;0.44];
    end
  end
  A = cell2mat(A);
  plot(A(1,:),A(2,:))
end