Carlo,
what is your example supposed to add as an additional insight? The way you
construct your dataset, the -if- qualifier is always true.
**********
clear*
set obs 10
g time=10*(uniform())
g target_var=time
**********
brings about the same result...
HTH
Martin
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Carlo Lazzaro
Sent: Wednesday, October 15, 2008 9:15 AM
To: [email protected]
Cc: 'Beatrice Crozza'
Subject: st: R: Merging obervations of two variables
Dear Beatrice,
If I have understood your query well, it seems that the problem lays in a
misuse in & operator in your first syntax sketch.
Please try the following one:
-------------begin example------------
set obs 10
g time=10*(uniform())
g code=1 in 1/10
replace code=2 in 3/6
g target_var=time if code==1 | code ==2
-------------end example------------
HTH and Kind Regards,
Carlo
-----Messaggio originale-----
Da: [email protected]
[mailto:[email protected]] Per conto di Beatrice Crozza
Inviato: mercoledì 15 ottobre 2008 0.39
A: [email protected]
Oggetto: st: Merging obervations of two variables
Dear all,
maybe this is a simple question, but I don't know how to overcome my
problem.
I have a variable time and I should generate another variables equal
to time when another variable (code) is equal to 1 or 2.
However, I don't know how to instruct stata for this.
I tried with:
gen time1= time if code==1 & code==2
but of course I will have all missing values.
Thus, I created two variables:
gen time1= time if code==1
gen time1= time if code==2
but I would like to merge the values of the two variables at this point.
Any idea of how to do this?
Thank you.
Best,
Bea
*
* 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/
*
* 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/
