I need to be able to chart multiple series with different X-axis. Sometimes the different series will share a common point on the X-axis, sometimes not.
Basically, the X-axis is a set of dates on which something was tested. Each series will be a different machine that is tested. So the X-axis will be a timeline, the Y-Axis a measurement of some sort. This is easy to achieve if each machine is sampled on the same date as the others, but this doesn't happen.