Sometimes you have non-consecutive data in Numbers that you wish to chart. For instance, you may have skipped dates or large gaps in time. However, you want to graph the data with a consistent timeline at the bottom of the graph even if all of the dates are not represented. Here is one method for doing that, using a second hidden table that is automatically populated from the main table.
Here is the Numbers file if you would like to play around with it yourself: NonConsecutiveNumbers.zip.