#10 Diagram with horizontal lines

[Christian]

When using the diagram with the option "rescale" enabled, the vertical lines don't give any idea of the absolute values.

Add horizontal lines that are dynamically displayed per every n values. n can be customized. As the maximum displayed value changes, the horizontal lines change accordingly.

Example:
with n=2 and a max value of
- 1 no horizontal line is displayed;
- 2 one horizontal line is displayed at the top;
- 3 one horizontal line is displayed at 2/3 of the height;
- 4 two horizontal lines are displayed (one at the top, another in the middle);