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Re: st: Merging obervations of two variables


From   "Beatrice Crozza" <beatrice.crozza@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Merging obervations of two variables
Date   Wed, 15 Oct 2008 18:59:42 +0100

Thanks everybody for the help!

Bea

2008/10/14 Domenico Flotta <domenico.flotta@gmail.com>:
> Basically, there are some syntax issues to be addressed. You can reach
> your objective by using one of the two following command:
> gen time1 = time if code == 1 | code == 2
> (pay attention to "|" character)
>
> or you can use a two-step command:
> gen time1 = time if code == 1
> replace time1 = time if code == 2
>
> Cheers.
>
> Domenico
>
> 2008/10/15, Beatrice Crozza <beatrice.crozza@gmail.com>:
>> 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
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