Thanks David, it did work!
In message <[email protected]>
[email protected] 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:[email protected]]
> Sent: 10 June 2005 16:23
> To: [email protected]
> 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
road.
> Any clues as to how can I accomplish this with programming?
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
>
>
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
--
Alejandro de la Fuente
QEH/Department of International Development
Oxford University
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
