# Re: st: RE: Specification for a 1/0 variable with consecutive non-missing observations

 From Alejandro Delafuente To statalist@hsphsun2.harvard.edu Subject Re: st: RE: Specification for a 1/0 variable with consecutive non-missing observations Date Fri, 10 Jun 2005 19:13:48 +0100 (BST)

```Thanks David, it did work!
In message <97D60F3695FA1A4E82535413AB0914A7375457@icnarc-app.icnarc.org>
statalist@hsphsun2.harvard.edu writes:
> Assuming your 40 variables are consecutively numbered in some way (here I
have assumed var1-var40), the following (untested) code should be about right...
>
> gen cons=0
> gen maxcons=0
> forvalues i=1/40 {
> 	replace cons=cons+1 if !missing(var`i')
> 	replace cons=0 if missing(var`i')
> 	replace maxcons=cons if cons>maxcons
> }
> gen byte cons20=maxcons>=20
>
> The final variable (cons20) is the 1/0 variable you are after (maxcons will
contain the longest run of consecutive non-missing variables).
>
> Hope this helps
>
> David
>
> -----Original Message-----
> From: Alejandro Delafuente
> [mailto:alejandro.delafuente@st-antonys.oxford.ac.uk]
> Sent: 10 June 2005 16:23
> To: statalist@hsphsun2.harvard.edu
> Subject: st: Specification for a 1/0 variable with consecutive
> non-missing observations
>
>
> Hi statalisters,
> I have a time series for 40 years (40 continuos variables) and am trying to
> create a 1/0 variable that indicates 1 (for each row) if at least 20
variables
> in the series have consecutive non-missing values and 0 if this condition is
> not accomplished. I do have more than 20 non-missing values for most of the
> variables per row, but there are gaps (ie, missing values) between them. Thus
I
> want to know how many fulfill the condition of 20 non-missing values in a
> Any clues as to how can I accomplish this with programming?
> *
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>
>
>
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>

--
Alejandro de la Fuente
QEH/Department of International Development
Oxford University
*
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```