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Re: AW: st: AW: compare files, vars only


From   Steven Samuels <sjhsamuels@earthlink.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: AW: st: AW: compare files, vars only
Date   Thu, 19 Feb 2009 11:49:47 -0500


It's easy enough to fix Johanne's code to bypass the the size difference problem:

-Steve

*************
 clear*
 sysuse auto, clear
 drop  gear_ratio displacement
 save newauto, replace
 sysuse auto, clear
 qui ds
 loc first `r(varlist)'

 des using newauto, varlist

 loc second `r(varlist)'
 loc diff12 : list first - second
 loc diff21 : list second - first
 di in red "In 1st, not 2nd:  `diff12'"
 di in blue "In 2nd, not 1st:  `diff21'"

 *************

On Feb 19, 2009, at 11:31 AM, Martin Weiss wrote:


<>

You probably meant


*************
des using newauto, varlist
*************

right in the middle of your code. My knee-jerk proposal depends on the first
dataset being larger than the second one, BTW...


HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Johannes Geyer
Gesendet: Donnerstag, 19. Februar 2009 17:25
An: statalist@hsphsun2.harvard.edu
Betreff: Re: st: AW: compare files, vars only

what about:

 *************
 clear*
 sysuse auto, clear
 drop  gear_ratio displacement
 save newauto, replace
 sysuse auto, clear
 qui ds
 loc first `r(varlist)'

 des using auto, varlist

 loc second `r(varlist)'
 loc diff: list first - second
 di in red "Differences: `diff'"
 *************

-describe- does not need to load the dataset which may be of interest here


Johannes

owner-statalist@hsphsun2.harvard.edu schrieb am 19/02/2009 16:53:44:

<>



*************
clear*
sysuse auto, clear
drop  gear_ratio displacement
save newauto, replace
sysuse auto, clear
qui ds
loc first `r(varlist)'
u newauto, clear
qui ds
loc second `r(varlist)'
loc diff: list first - second
di in red "Differences: `diff'"
*************

I am sure I have violated several rules on the possible lengths of
components in here (think 244...)


HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von David
Kantor
Gesendet: Donnerstag, 19. Februar 2009 16:41
An: Statalist
Betreff: st: compare files, vars only

Hi.
Does anyone know of a program to compare the sets of variables in two
data files? What I have in mind is something akin to -cf-, but...
  it would not compare values -- only the names of variables;
  it would not care whether the two data files had the same number of
observations.

I was planning to write such a program, but I wanted to be sure that
it hadn't already been done.
Thanks
--David

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