static const double LogTick;

A constant equals to +1.6e308 to represent that the ticks in a log scale axis should be 1 - 2 - 5 - 10 style increments.

For example, a log scale axis using LogTick may have labels like 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, .... The 1 - 2 - 5 - 10 labels are chosen because they are approximately equally spaced visually in log scale.

This constant is used in Axis.setLogScale.