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| From | Tzaloupas Dimitrov <tzaloupas1232@yahoo.gr> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | st: Σχετ: st: getting Stata to understand the format of the dates |
| Date | Tue, 5 Feb 2013 19:00:38 +0000 (GMT) |
thanks Nick ----- Αρχικό μήνυμα ----- Απο: Nick Cox <njcoxstata@gmail.com> Προς: statalist@hsphsun2.harvard.edu Κοιν.: Στάλθηκε: 7:31 μ.μ. Τρίτη, 5 Φεβρουαρίου 2013 Θέμα: Re: st: getting Stata to understand the format of the dates Note that this will work too: gen emonth1=mofd(date(dates, "MDY")) Note also -- and this is not widely known -- that -daily()- is a synonym for -date()-. There is some history there. Apart from say years -- which don't need special treatment -- Stata had at first just one kind of date, daily dates, and -date()- was a function to take in string daily dates and emit numeric daily dates. The name -daily()- does not carry that ambiguity. However, -monthly()- is in the same kind of way a function to take in string monthly dates and emit numeric monthly dates. It is _not_ a conversion function to take in other kinds of dates and emit numeric monthly dates, and as Jeph explains, you need -mofd()- for that purpose. Nick On Tue, Feb 5, 2013 at 6:14 PM, Jeph Herrin <stata@spandrel.net> wrote: > This will produce a date variable: > > gen edate1=date(dates,"MDY") > format edate1 %td > > and if you want the month > > gen emonth1=mofd(edate1) > format emonth1 %tm > > Then, you would declare your data time series data: > > tsset emonth1 On 2/5/2013 1:10 PM, Tzaloupas Dimitrov wrote: >> I have a column with this date format >> >> >> dates >> 01/07/2009 >> 01/08/2009 >> 01/09/2009 >> 01/10/2009 >> 01/11/2009 >> 01/12/2009 >> 01/01/2010 >> 01/02/2010 >> 01/03/2010 >> 01/04/2010 >> 01/05/2010 >> 01/06/2010 >> 01/07/2010 >> >> >> HOw can i get stata understand that this is a time series data set of >> monthly observations? >> >> I tried something like >> >> gen edate1 = monthly(dates, "DMY") >> >> but it seems that it does not work >> >> Any suggestions? >> >> I use 64 bit Stata 11 * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/