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st: Generating exact copy of variable


From   "Philipp Rehm" <Philipp.Rehm@gmx.de>
To   statalist@hsphsun2.harvard.edu
Subject   st: Generating exact copy of variable
Date   Fri, 15 May 2009 15:17:22 +0200

Dear all,

is there a way to generate an exact copy of a variable? By "exact copy", I mean a variable with the same storage type, display format and value label. (I can't use -rename- for my problem). I am using Stata/SE 10.1, Windows XP.

Below is an example of the problem I ran into.

Many thanks,
Philipp


. gen test_id= id

. compare test_id id

                                        ---------- difference ----------
                            count       minimum      average     maximum
------------------------------------------------------------------------
test_id<id                 543121          -121    -4.120179          -1
test_id=id                  79808
test_id>id                 157474             1     19.96243         127
                       ----------
jointly defined            780403          -121     1.160693         127
                       ----------
total                      780403

. d test_id id

              storage  display     value
variable name   type   format      label      variable label
-------------------------------------------------------------------------------------------------------------------------------------
test_id         float  %9.0g
id              double %10.0g                 personal id

. gen double test2_id= id

. compare test2_id id

                                        ---------- difference ----------
                            count       minimum      average     maximum
------------------------------------------------------------------------
test2_id=id                780403
                       ----------
jointly defined            780403             0            0           0
                       ----------
total                      780403



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