What about:
. contract year drug, freq(n)
. separate n, by(drug)
. graph n1 n2 n3 year, c(lll) sort
(not tested)
regards
uli
Giulio Rizzoli wrote:
> Dear Sir
> I have stata7.
> I have this table with the yearly frequence of use of the variable drug= 1
> or 2 or 3 (labelled AA BB CC)
> .label value drug drugf
> .table opy drug
> year AA BB CC
> ____________________
> 1970 8
> 1971 4
> 1973 1
> 1974 8
> 1975 19
> 1976 27
> 1977 34
> 1978 29
> 1979 26
> 1980 9
> 1981 16
> 1982 8
> 1983 3 2
> 1984 1 6
> 1985 9
> 1986 18
> 1987 5
> 1988 1
> 1989 1
> 1990 7 1
> 1991 9
> 1992 6 8
> 1993 11
> 1994 20
> 1995 1 30
> 1996 1 40
> 1997 1 56
> 1998 65
> 1999 24
> 2000 1 5
> 2001 20
> 2002 36
> _________________________
>
> Question: how can I produce a line plot of the frequences of AA BB CC
> across years with a different line for each ?
> Giulio Rizzoli
>
>
> *
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> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
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