XMOD

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

XMOD is another control on the numbering for the x-axis.

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