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