YMOD

Syntax: SET YMOD n
GET YMOD { n }
Default: YMOD = 0

YMOD is another control on the numbering for the y-axis.

valuemeaning
 YMOD  >  1 the numbers displayed on the y-axis are modulo YMOD and positive. If the number to be displayed on the axis is N then the number that is actually displayed is |N-YMOD*(N/YMOD)|+YOFFSET
|YMOD| ≤  1 the numbers will be displayed normally
 YMOD  < -1 the numbers will be modulo |YMOD| and may be negative