XNUMBERSON
SET XNUMBERSON n GET XNUMBERSON { n }
XNUMBERSON = 1
XNUMBERSON controls whether or not numbers are drawn labeling the x-axis.
XNUMBERSON = 0 → do not draw the numbers XNUMBERSON ≠ 0 → draw the numbers
XNUMBERSON = 0
XNUMBERSON ≠ 0