Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


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

Re: st: Differencing problem


From   Sergiy Radyakin <serjradyakin@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Differencing problem
Date   Wed, 26 Jun 2013 16:40:46 -0400

See if this works. The problem may be with the time variable. Sergiy

sysuse auto,clear
generate t=_n
tsset t
generate x=d.mpg
list mpg x


On Wed, Jun 26, 2013 at 4:20 PM, Michael Betz
<betz.40@buckeyemail.osu.edu> wrote:
> Hi,
>
> I am trying to use the "d." operator to get differenced observations but am having some trouble. When I try to calculate differenced observations using
>
> gen newvar=d.(var)
>
> Stata returns each observation as missing. My data has observations for each variable in each of two time periods and variation exists over the two time periods. I've used the "d." before without problems so I'm not sure what I'm missing here. Any help is appreciated.
>
> Mike
>
>
> *
> *   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/


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