title: Error multiplying two numpy arrays
body: <p>I am getting an error that I don't quite understand with the following script. I thought I would be able to multiple the two numpy arrays happliy but I keep getting this error:</p>
  
  <pre><code>TypeError: unsupported operand type(s) for *: 'numpy.ndarray' and 'numpy.ndarray'
  </code></pre>
  
  <p>The script is below:</p>
  
  <pre><code>def currents_to_resistance(Istack1, Istack2, A_list, x_list):
  
      #Error Calcs
      Videal_R1 = (1.380648e-23 * (27+273.15)) / (1.6021766e-19)
      print Videal_R1
      Istack1 = np.array(Istack1)
      Istack2 = np.array(Istack2)
      print Istack1
      print Istack2   
  
      g = Istack1*Istack2
      print g 
  </code></pre>
  
  <p>The print Istack1 Istack2 before the multiply come out as</p>
  
  <pre><code>['0.0005789047' '0.0005743839' '0.0005699334' '0.000565551' '0.0005612346'
   '0.0005569839' '0.0005527969' '0.0005486719' '0.000544608' '0.0005406044'
   '0.0005366572' '0.000532768' '0.000528934' '0.0005251549' '0.0005214295'
   '0.0005177562' '0.0005141338' '0.0005105614' '0.000507039' '0.0005035643'
   '0.0005001368' '0.0004967555' '0.0004934193' '0.0004901279' '0.0004868796'
   '0.0004836736']
  ['0.000608027' '0.0006080265' '0.0006080267' '0.0006080267' '0.0006080261'
   '0.0006080261' '0.0006080262' '0.0006080261' '0.0006080263' '0.0006080272'
   '0.0006080262' '0.0006080262' '0.0006080257' '0.0006080256' '0.0006080258'
   '0.0006080256' '0.0006080252' '0.0006080247' '0.000608025' '0.0006080249'
   '0.000608025' '0.0006080251' '0.0006080249' '0.0006080254' '0.0006080251'
   '0.0006080247']
  </code></pre>
  
  <p>I call the function using</p>
  
  <pre><code>Re_list = currents_to_resistance(full_list[i][0],full_list[i][1], temp_A, temp_x)
  </code></pre>
  
  <p>What am I missing here?</p>