Statalist


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

Re: st: Sum of variables with missing values


From   Joseph McDonnell <jockmcdock@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Sum of variables with missing values
Date   Thu, 9 Apr 2009 10:49:02 +0930

Worse still..at some stage you would have to change the zeroes back to
missing. How would you differentiate between genuine zeroes and
missings masquarading as zeroes? It could be done, but it'd be a lot
of work for little gain and a good chance of stuffing things up.

Joseph

On Thu, Apr 9, 2009 at 7:28 AM, Caleb Southworth <caleb@uoregon.edu> wrote:
> On Wed, 8 Apr 2009, Eldon Spackman wrote:
>
> :You could replace missing values with the value 0.
> :Eldon
>
> That is a poor practice. Zero often has real meaning. Changing missing
> to zero will alter the mean, if that were important. cf -mvencode- and
> -mvdecode-
> *
> *   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