om one reflect a distortion of the underlying data.</p>
<p>The lie factor supports the argument that one should always include the zero point in a bar chart in many cases. In Figure <a href="data-visualization.html#fig:barCharLieFactor">4.9</a> we plot the same data with and without zero in the Y axis. In panel A, the proportional difference in area between the two bars is exactly the same as the proportional difference between the values (i.e. lie factor = 1), whereas in Panel B (where zero is not include