title: How to create a histogram with varying bin widths
body: <p>I have been unsuccessful with other using hist plot.
  A simple problem would be using the following data:</p>
  
  <pre><code>age range - frequency - central band width -  bin width  - height (respectively)
  1-4    - 30      -      2.5     -         3    -   10
  5-6   -  20     -       5.5        -      1   -    20
  7-17  -  30       -     12      -         10   -   3
  </code></pre>
  
  <p>With age along the X axis, with a linear scale, so the bin width for 1-4 would be 3, with height 10, bin width for 5-6 would be 1 with height of 20, and 7-17 would be 10 and the height would be 3.</p>
  
  <p>How would can I place these data into a Word/notepad document <code>.dat</code> file?
  And how can I then use them to set up a histogram in <code>gnuplot</code>?</p>