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: "covariates in dataset 2 do not match covariates in dataset1"


From   Michelle L Stransky <mlu6@cisunix.unh.edu>
To   statalist@hsphsun2.harvard.edu, Maarten buis <maartenbuis@yahoo.co.uk>
Subject   Re: st: "covariates in dataset 2 do not match covariates in dataset1"
Date   Tue, 16 Mar 2010 09:37:07 -0400

Yes, I do have a _mj and _mi. Could these be getting 'lost' between regression commands?

Thanks.

Michelle

* Maarten buis <maartenbuis@yahoo.co.uk> [Tue 16 Mar 2010 04:05:22 AM EDT]:

--- On Mon, 15/3/10, Michelle L Stransky wrote:
I'm working with a multiply imputed dataset (so I have 5
poverty variables to account for missing values).  I
used the -reshape long- command to make each imputed
variable it's own case (so now, for each case, I have it
listed 5 times each with 1 imputation of income).

I'm running a series of regressions, trying to fine tune
the predictor variables.  The first regression runs
fine but subsequent regressions (whether I use my .do file
or copy & paste them into the command window) will not
calculate.  I receive an error message stating that
"covariates in dataset 2 do not match covariates in
dataset1".

I checked the file and everything seemed fine; the only
things that don't exactly match across imputations of the
dataset are the poverty values.  In fact, I've used
this exact procedure on 2 other (very similar) datasets with
no problems.  It's only been in the last month that I
receive this message.

What doesn't make sense to me is that the first regression
command runs perfectly fine but subsequent commands do not
(they're all in exactly the same form-- mim: svy: logistic
dv iv1 iv2 iv3).  And if I close Stata and then open it
and run the second regression it works.  I've attempted
to run this analysis on Stata9 Intercooled and Stata11
SE.  It doesn't seem to matter; I receive the same
error.

Do you have any recommendations or suggestions for me as to
why this happens and/or how to fix it?


-mim- is looking for a variable _mj to identify the different
datasets and _mi to identify the observations. Do these exist
in your dataset?

-- Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------




*
*   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   |   Site index