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Re: st: How can I loop this?


From   Adam Guerrero <adamgue@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: How can I loop this?
Date   Sat, 4 May 2013 16:45:48 -0400

Hi Nick,

Awesome. Thank you so much for your reply...reading all FAQs now!  :-)

ag

On Sat, May 4, 2013 at 4:32 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> No need to loop.
>
> Your question is an FAQ.
>
> http://www.stata.com/support/faqs/data-management/replacing-missing-values/
>
> Nick
> njcoxstata@gmail.com
>
>
> On 4 May 2013 21:23, Adam Guerrero <adamgue@gmail.com> wrote:
>> Hi Stata Users,
>>
>> I have an unbalanced panel comprised of student years which can be
>> reshaped into student terms (six years, three terms per year,
>> providing a maximum 18 observations per student).  One of the
>> variables included in the data is a student's major area of
>> specialization - major1.
>>
>> For some students this variable is defined at the start of their
>> educations, missing for a few years, then defined again.  After
>> consulting with the registrar at the institution under analysis the
>> following code was used to fill in the gaps
>>
>> by id: replace major1=major1[_n+1] if major1=="" & major1[_n+1]!="" & _n!=_N
>> by id: replace major1=major1[_n+1] if major1=="" & major1[_n+1]!="" & _n!=_N
>> by id: replace major1=major1[_n+1] if major1=="" & major1[_n+1]!="" & _n!=_N
>> by id: replace major1=major1[_n+1] if major1=="" & major1[_n+1]!="" & _n!=_N
>> by id: replace major1=major1[_n+1] if major1=="" & major1[_n+1]!="" & _n!=_N
>>
>> In other words, I had to type the same line of code over and over
>> until all of the values were replaced.  My question is whether there
>> is a more efficient way to do this?  I'm relatively new to Stata, so
>> any advice would be very much appreciated.
>>
>> Adam Antonio
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-- 
Adam A. Guerrero
Skype: adamadam3741
Phone: 214-274-3776
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