title: find a minimum value in an array of floats
body: <p>how would one go about finding the minimum value in an array of 100 floats in python?
  I have tried <code>minindex=darr.argmin()</code> and <code>print darr[minindex]</code> with <code>import numpy</code> (darr is the name of the array)</p>
  
  <p>but i get:
  <code>minindex=darr.argmin()</code></p>
  
  <p><code>AttributeError: 'list' object has no attribute 'argmin'</code></p>
  
  <p>what might be the problem? is there a better alternative?</p>
  
  <p>thanks in advance</p>