Algorithm for “nice” grid line intervals on a graph

Question

I need a reasonably smart algorithm to come up with \"nice\" grid lines for a graph (chart).

For example, assume a bar chart with values of 10, 30, 72 and 60. You k

Answer 1

I am the author of "Algorithm for Optimal Scaling on a Chart Axis". It used to be hosted on trollop.org, but I have recently moved domains/blogging engines.

Please see my answer to a related question.