#13 New chart type: Discrete line graph

[Matthias Grimm]

Usually a graph interpolates linearly between two points, but sometimes a value can only accept certain values and stick to them until the next point arrives. The result is a discrete graph that moves in steps. It is like a continously bar graph.

I added a new parameter $Discrete to the function drawLineGraph() which could be set true or false. If set to false (default), the line graph will interpolate inbetween intervals. If set to true the graph will jump to the new value and stick to that value until the next point.

This type of graph is needed eg. to show money on a bank account. Usually the money won't increase between two bookings ;-)

Best Regards
Matthias Grimm

[Matthias Grimm]