How to transform year of birth to age

[tommy chai]

Dear All,

Does anyone know the command for transforming year of birth to age?

For example:

. tab A1

In what year |
were you |
born? |
(record |
numeric) | Freq. Percent Cum.
-------------+-----------------------------------
1950 | 1 0.05 0.05
1951 | 1 0.05 0.11
1952 | 1 0.05 0.16
1953 | 1 0.05 0.22
1954 | 3 0.16 0.38
1955 | 3 0.16 0.54
1956 | 6 0.32 0.86
1957 | 5 0.27 1.13
1981 | 15 0.81 90.56
1982 | 9 0.49 91.04
1983 | 17 0.92 91.96
1984 | 10 0.54 92.50
1985 | 16 0.86 93.36
1986 | 19 1.03 94.39
1987 | 12 0.65 95.04
1988 | 10 0.54 95.57
1989 | 10 0.54 96.11
1990 | 6 0.32 96.44
1991 | 10 0.54 96.98
1992 | 6 0.32 97.30
1993 | 9 0.49 97.79
1994 | 6 0.32 98.11
1995 | 10 0.54 98.65
1996 | 11 0.59 99.24
1997 | 7 0.38 99.62
1998 | 6 0.32 99.95


The numeric variable column (e.g. 1901, 1918, 1921...) all represents the year of birth. I need to change these numeric values to age (as of 2017).

Do I have to recode every singly one of them? I.e. recode A1 (1950=67) (1951=68) ... (1998=19)


Many thanks,

Tommy

[Martyn Sherriff]

Does

gen age = 2017 - A1

do what you want?
Martyn