Many thanks Martin for this great solution.
On Thu, Oct 8, 2009 at 12:17 AM, Martin Weiss <[email protected]> wrote:
>
> <>
>
>
>
> *************
> clear*
>
> input byte(id x)
> 1 1
> 1 1
> 1 1
> 1 1
> 1 0
> 1 0
> 1 1
> 1 1
> 2 1
> end
>
> compress
>
> gen byte y=0
> replace y= /*
> */ cond(x[_n-1]!=x[_n], 0, /*
> */ y[_n-1]+1) in 2/l
>
> list, noobs
> *************
>
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: [email protected]
> [mailto:[email protected]] Im Auftrag von Quang Nguyen
> Gesendet: Donnerstag, 8. Oktober 2009 11:40
> An: [email protected]
> Betreff: st: Fun with switching point
>
> Dear all:
>
> Suppose, I have the following data:
>
> id x
> 1 1
> 1 1
> 1 1
> 1 1
> 1 0
> 1 0
> 1 1
> 1 1
> 2 1
> ..
>
> Now, I would like to generate a variable _y _such that _y_ takes the
> ordering value of 1, 2, 3... as long as the corresponding _x_ takes
> the same value as the previous observation. Otherwise, _y_ is 0.
> Specifically, from the above data, we have:
>
> id x y
> 1 1
> 1 1 1
> 1 1 2
> 1 1 3
> 1 0 0
> 1 0 1
> 1 1 0
> 1 1 1
> 2 1 2
> ..
>
> Can you suggest a way to do this in Stata?
> --
> "My father gave me the greatest gift anyone could give another person,
> he believed in me." - Jim Valvano
> *
> * 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/
>
>
> *
> * 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/
>
--
"My father gave me the greatest gift anyone could give another person,
he believed in me." - Jim Valvano
*
* 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/
