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 on April 23, and its replacement, statalist.org is already up and running.


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

RE: st: Replace missing values by 0


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Replace missing values by 0
Date   Mon, 9 Aug 2010 16:14:40 +0100

I have one specific and one general comment here. 

Specifically, Martin is correct to underline that . is not the only missing value, but the loop in question is easily fixed by 

foreach x of varlist prean pa_kurn{
  replace `x' = 0 if missing(x) 
}

Generally, a minimal -search missing- points to several resources. One of the very first entries, to [I] missing values, answers this question comprehensively, so it is difficult to see why it was felt necessary to send it to Statalist. 

Nick 
n.j.cox@durham.ac.uk 

Martin Weiss
============

Stata even forgives the missing blank after -if-! Amazing!

*************
clear*
inp prean pa_kurn
2 3
. 5
. 3
. .
4 5
end
foreach x of varlist prean pa_kurn{
  replace `x' = 0 if(`x' == .)
}
l
*************


One problem with this "first-principles" approach is that you have to compare explicitly with all missing values, i.e. also the extended ones.
-recode- can help avoid this problem.

Neil Shephard
=============

foreach x of varlist prean pa_kurn{
  replace `x' = 0 if(`x' == .)
}

...is one way to skin this cat.



Martin Weiss
============

clear*
input myvar
1
3
5
.
3
6
7
end

recode myvar (mis = 0)
l


Tirthankar Chakravarty

-mvencode-

Tobias Friedli

> I have two variabled called "prean" and "pa_kum" that contain missing values.
> These missing values i would like to replace by 0 (zero). What command can i
> use to do this?

*
*   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