title: numpy.loadtxt, ValueError: could not convert string to float
body: <p>This is sample from large csv file:</p>
  
  <pre><code>6.1;6.1;7.2;8.9;5.0;
  8.9;10.0;8.9;6.1;5.0;
  </code></pre>
  
  <p>If I try to read it to numpy array with <code>np.loadtxt('test.csv', delimiter=';')</code> I get:</p>
  
  <blockquote>
    <p>ValueError: could not convert string to float:</p>
  </blockquote>
  
  <p>and don't understand why?</p>