title: poisson distribution over a histogram
body: <p>this program is supposed to put a poisson distribution on a plotting graph. but when i run it nothing appears. i've tried to rearrange the code, but it tells me that x and y are not in the same dimension...</p>
  
  <p>can someone figure it out?</p>
  
  <pre><code>from numpy import *
  from scipy.special import gamma
  import pylab
  import matplotlib.pyplot
  mu = 70
  counts = range(45,101,1)
  for counts in range(46,96,1):
  
  p = exp(-mu) * mu**counts / gamma(counts +1)
  pylab.plot(counts,p)
  
  
  pylab.show()
  </code></pre>