different setYAxisTickMarkSpacingHint for each axis group

[landret]

Hi,
it would be great if we could have a setYAxisTickMarkSpacingHint() for each axis group. For instance, if we have one axis group displaying boolean values (0 or 1), and another one displaying number between 0 to 100, this would avoid the display of decimal numbers 0.1 0.2 0.3... for the boolean values axis.