DAY_INTERVAL
(UC: NDAY)

Type Integer
Initial value Undefined
Description When I use UCXADY/UCYADY I designate every how many days I paint an indication and the date. Do not paint an indication and the date just painting an axis at the time of (0 or less that a proper value is chosen out of 0,1,2,5,10,15 if they are Undefined although they are NDAY'); the positive to I use the value if it is given. As for this NUCDAY' decides a function'.