Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: AW: compare files, vars only


From   Jeph Herrin <junk@spandrel.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: AW: compare files, vars only
Date   Fri, 20 Feb 2009 08:30:52 -0500

If you look closely, my first posting of this was 15 minutes before
Samuel's. So perhaps you should redirect this thought to him...:)

cheers,
Jeph


Martin Weiss wrote:
<>

Wow, this thing lingers on, but I think we have seen this variation before...
http://www.stata.com/statalist/archive/2009-02/msg00826.html


HTH
Martin
_______________________
----- Original Message ----- From: "Jeph Herrin" <jeph.herrin@yale.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Thursday, February 19, 2009 5:34 PM
Subject: Re: st: AW: compare files, vars only


I think

 loc diff : list first - second

will only give the variables in the first file not in the
second, but ignores those in the second not in the first.

how about:

************* compare variables ********
program define compvars
syntax using/
tempname file1 file2 equiv diff1 diff2
quietly d , varlist
local `file1'=r(varlist)
quietly d using `using', varlist
local `file2'=r(varlist)
local `equiv' : list `file1'===`file2'
if ``equiv''!=1 {
local `diff1' : list `file1'-`file2'
local `diff2' : list `file2'-`file1'
di "Difference: "
di "   In master not using:  "
di "                ``diff1''"
di "   In using not master:  "
di "                ``diff2''"
}
else {
di "Difference: "
di "   None!    "
}
end
****************************************************

Whence:

. sysuse auto
. drop  gear_ratio displacement
. save newauto,replace
. sysuse auto
. compvars using newauto
Difference:
   In master not using:
                displacement gear_ratio
   In using not master:


hth,
Jeph



Johannes Geyer wrote:
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

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/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/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/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/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/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/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index