Stata 11 help for floor() help floor() ------------------------------------------------------------------------------- Title [D] functions -- Functions Mathematical function floor(x) Domain: -8e+307 to 8e+307 Range: integers in -8e+307 to 8e+307 Description: returns the unique integer n such that n < x < n + 1. returns x (not ".") if x is missing, meaning that floor(.a) = .a. Also see ceil(x), int(x), and round(x). Also see Manual: [D] functions Help: [D] functions, [D] functions (math functions)