Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.

# Re: st: Mata question on replacing missing values

 From Matthew White To statalist@hsphsun2.harvard.edu Subject Re: st: Mata question on replacing missing values Date Thu, 22 Dec 2011 10:45:15 -0500

Hi Matt,

Z = (X :!= .) :* editmissing(X, 0) + (X :== .) :* Y

Best,
Matt

On Thu, Dec 22, 2011 at 9:45 AM, Matthew Baker
<matthew.baker@hunter.cuny.edu> wrote:
> Dear Listers:
>
>     I am curious if there is a simple solution to the following
> problem in Mata. I have two vectors (call them X and Y). X has missing
> values, while Y does not. What I would like to do is make a third
> vector, Z, which is composed of X when the value of X is not missing,
> and Y otherwise. For example, if I have X=(5,6,.,.,4)', and
> Y=(1,5,3,2,3)', I would like Z to be Z=(5,6,3,2,4)'. In order:
>
>
> : X,Y,Z
>       1   2   3
>    +-------------+
>  1 |  5   1   5  |
>  2 |  6   5   6  |
>  3 |  .   3   3  |
>  4 |  .   2   2  |
>  5 |  4   3   4  |
>    +-------------+
>
> Is there a simple solution?
>
>
> Matt Baker
>
> --
> Dr. Matthew J. Baker
> Department of Economics
> Hunter College and the Graduate Center, CUNY
> *
> *   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/

--
Matthew White
Data Coordinator
Innovations for Poverty Action
101 Whitney Avenue, New Haven, CT 06510 USA
+1 434-305-9861
www.poverty-action.org

*
*   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/