title: Histogram from data which is already binned, I have bins and frequency values
body: <p>All the matplotlib <a href="http://matplotlib.org/examples/pylab_examples/histogram_demo_extended.html" rel="noreferrer">examples</a> with <code>hist()</code> generate a data set, provide the data set to the <code>hist</code> function with some bins (possibly non-uniformly spaced) and the function automatically calculates and then plots the histogram.</p>
  
  <p>I already have histogram data and I simply want to plot it, how can I do that?! For example, I have the bins (half open ranges are denoted by the square and curved bracket notation),</p>
  
  <pre><code>[0, 1)   0
  [1, 2)   3
  [2, 3)   8
  [3, 4)   6
  [4, 5)   2
  [5, 6)   3
  [6, 7)   1
  [7, 8)   0
  </code></pre>