初学者求助

shiyiming

if age eq . then age=19
这里的 "."如何理解

shiyiming

that question is easy. i can do it!!!
[color=#FF0040:35d700cx]if age eq . then age=19[/color:35d700cx]

same to say:
if age (numeric variable) is missing, then age equals to 19;
the same way include:

if age = . then age =19
or
if missing(age) then age=19;
or
age = ifn(^missing(age), age, 19);