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Re: st: Mata question on replacing missing values


From   Matthew White <[email protected]>
To   [email protected]
Subject   Re: st: Mata question on replacing missing values
Date   Thu, 22 Dec 2011 10:45:15 -0500

Hi Matt,

How about:

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

Best,
Matt

On Thu, Dec 22, 2011 at 9:45 AM, Matthew Baker
<[email protected]> 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?
>
> Thanks in advance,
>
> Matt Baker
>
> --
> Dr. Matthew J. Baker
> Department of Economics
> Hunter College and the Graduate Center, CUNY
> *
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-- 
Matthew White
Data Coordinator
Innovations for Poverty Action
101 Whitney Avenue, New Haven, CT 06510 USA
+1 434-305-9861
www.poverty-action.org

*
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