Re: st: decimal years

[Jeph Herrin <jherrin@flyingbuttress.net>]

Oops, that third line should be reversed or even simplified:

  gen daysinyear=doy(12,31,year)

the point being that Stata doesn't have (as far as I know)
a function for identifying leap years, though it shouldn't
be difficult to write one I suppose.

Jeph


Jeph Herrin wrote:
> If your variable is -date-, the only tricky part is getting
> the number of days in the year. Try:
>
> gen year = round(date,0)
> gen daysinyear=mdy(1,1,year)-mdy(12,31,year)
> gen day = round((date-year)*daysinyear,0)
> gen newdate=mdy(1,1,year)+day
>
> Then -newdate- should contain the date in Stata's elapsed date format.
>
> HTH,
> Jeph
>
>
>
> Caleb Southworth wrote:
> > How can decimal years be read into stata? The data are %9.4f and identify
> > year, month and day, for example
> >
> > event1
> > 1932.2880
> > 1949.0410
> > 1939.4270
> >
> > I would like to be able to extract the mdy and to be able to tsset my
> > data, the latter requiring integers.
> >
> > Caleb
> > caleb@uoregon.edu
> > University of Oregon Sociology
> > *
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> *
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*
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