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st: re: Using dates


From   Kit Baum <kitbaum@mac.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: re: Using dates
Date   Wed, 15 Apr 2009 10:07:59 -0400

<>
. g strdate=string(var1,"%19.0f")

. l

     +----------+
     |  strdate |
     |----------|
  1. | 20090102 |
  2. | 20090107 |
  3. | 20090112 |
  4. | 20090126 |
     +----------+

. g numdate = date(strdate,"YMD")

. format numdate %td

. g year = yofd(numdate)

. g month = month(numdate)

. g day = day(numdate)

. g week = week(numdate)

. g dow = dow(numdate)

. l

     +--------------------------------------------------------+
     |  strdate     numdate   year   month   day   week   dow |
     |--------------------------------------------------------|
  1. | 20090102   02jan2009   2009       1     2      1     5 |
  2. | 20090107   07jan2009   2009       1     7      1     3 |
  3. | 20090112   12jan2009   2009       1    12      2     1 |
  4. | 20090126   26jan2009   2009       1    26      4     1 |
     +--------------------------------------------------------+



try -help dates and times-

Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html
   An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html



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