title: numpy array assign values from another array
body: <p>If I do something like this:</p>
  
  <pre><code>import numpy as np
  b=np.array([1,2,3,4,5])
  c=np.array([0.6,0.7,0.8,0.9])
  b[1:]=c
  </code></pre>
  
  <p>I get b =</p>
  
  <pre><code>array([1,0,0,0,0])
  </code></pre>
  
  <p>It works fine if c only contains integers. But I have fractions.
  I wish to get something like this:</p>
  
  <pre><code>array([1,0.6,0.7,0.8,0.9])
  </code></pre>
  
  <p>How can I achieve that?</p>