title: Self-Organizing Maps (SOM) problem in MATLAB
body: <p>I have a text file that include data.
  My text file:</p>
  
  <pre><code>young, myopic, no, reduced, no
  young, myopic, no, normal, soft
  young, myopic, yes, reduced, no
  young, myopic, yes, normal, hard
  young, hyperopia, no, reduced, no
  young, hyperopia, no, normal, soft
  young, hyperopia, yes, reduced, no
  young, hyperopia, yes, normal, hard
  </code></pre>
  
  <p>I read my text file load method</p>
  
  <pre><code>%young=1
  %myopic=2
  %no=3 etc.
  
  load iris.txt
  net = newsom(1,[1 5]);
  [net,tr] = train(net,1);
  plotsomplanes(net);
  </code></pre>
  
  <p>Error code:</p>
  
  <blockquote>
    <p>??? Undefined function or method
    'plotsomplanes' for input arguments of
    type 'network'.</p>
  </blockquote>