title: How to convert a list of strings into a numeric numpy array?
body: <p>I want to be able to calculate the mean, min and max of <code>A</code>:</p>
  
  <pre><code> import numpy as np
  
   A = ['33.33', '33.33', '33.33', '33.37']
  
   NA = np.asarray(A)
  
   AVG = np.mean(NA, axis=0)
  
   print AVG
  </code></pre>
  
  <p>This does not work, unless converted to:</p>
  
  <pre><code>A = [33.33, 33.33, 33.33, 33.37]
  </code></pre>
  
  <p>Is it possible to perform this conversion automatically?</p>