Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.

# Re: st: Loop to replace values of a variable

 From emanuele mazzini To statalist@hsphsun2.harvard.edu Subject Re: st: Loop to replace values of a variable Date Wed, 18 Dec 2013 14:44:38 +0100

```Oh, yes, I see. Thank you very much for your answers, but I may have
oversimplified, since what you said would fit in this case, as x is
exactly = _n/10, but my problem is slightly more complex.

What if the values I want to replace go from -2.5 to 2.15, still with
a 0.1 interval? In this case I'd still need a loop, right?

2013/12/18 Maarten Buis <maartenlbuis@gmail.com>:
> no need to loop:
>
> gen x = _n*.1
>
> Hope this helps,
> Maarten
>
>
> On Wed, Dec 18, 2013 at 2:33 PM, emanuele mazzini
>> Dear all statalist users,
>>
>> I would like to program a (relatively) simple loop to replace the
>> values of a variable I created, but I cannot  figure it out how to
>> write the syntax.
>>
>> The structure of my data is very simple:
>> I have 300 observations and a variable, say x, that in the first cell
>> (i.e. for n=1) is equal to 0.1, while it is missing for all other 299
>> cells. Data look like:
>>
>> n     x
>> 1    0.1
>> 2     .
>> 3     .
>> 4     .
>> .
>> .
>> .
>> .
>> .
>> 299  .
>> 300  .
>>
>> I would like the loop to replace the missing values of my variable by
>> going from cell 2 to cell 300, and to have a replace that would be at
>> a 0.1 intervals, so as to obtain data that look like:
>>
>> n     x
>> 1    0.1
>> 2    0.2
>> 3    0.3
>> 4    0.4
>> .
>> .
>> .
>> .
>> .
>> 299  29.9
>> 300  30
>>
>> I can obviously do it by hand, but a loop would be naturally much more
>> efficient!
>> Does anyone know how to make it?
>>
>> Thank you in advance.
>> *
>> *   For searches and help try:
>> *   http://www.stata.com/help.cgi?search
>> *   http://www.stata.com/support/faqs/resources/statalist-faq/
>> *   http://www.ats.ucla.edu/stat/stata/
>
>
>
> --
> ---------------------------------
> Maarten L. Buis
> WZB
> Reichpietschufer 50
> 10785 Berlin
> Germany
>
> http://www.maartenbuis.nl
> ---------------------------------
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/faqs/resources/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/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/
```