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| From | Nick Cox <njcoxstata@gmail.com> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | Re: st: -foreach- loop to fit regression at each level of a variable |
| Date | Tue, 19 Nov 2013 12:57:42 +0000 |
Please read the whole of my reply and the FAQ referred to.
Nick
njcoxstata@gmail.com
On 19 November 2013 12:47, Milena Przheska
<milena.przheska@cosmicdevelopment.com> wrote:
> Yes, I fixed that with the following:
>
>
> levelsof sample, local(sample_levels)
>
> but the -foreach- still does not work
>
>
> On Tue, Nov 19, 2013 at 1:43 PM, Nick Cox <njcoxstata@gmail.com> wrote:
>> Also, there is no legal syntax
>>
>> -egen local-
>> Nick
>> njcoxstata@gmail.com
>>
>>
>> On 19 November 2013 12:42, Nick Cox <njcoxstata@gmail.com> wrote:
>>> Just looking at the help for a few seconds establishes that
>>>
>>> 1. There is no -levelsof()- function for -egen-.
>>>
>>> 2. -foreach ... of- requires a key word specifying a list type to follow.
>>>
>>> Also you should learn in type in Stata
>>>
>>> . search foreach
>>>
>>> to find resources. In this case,
>>>
>>> http://www.stata.com/support/faqs/data-management/try-all-values-with-foreach/
>>>
>>> is most focused on your problem.
>>>
>>> Nick
>>> njcoxstata@gmail.com
>>>
>>>
>>> On 19 November 2013 12:34, Milena Przheska
>>> <milena.przheska@cosmicdevelopment.com> wrote:
>>>
>>>> I am trying to fit the same logistic regression model using different
>>>> samples from a data set and I am wondering if it is even possible to
>>>> use a -foreach- loop to estimate regression models for each sample
>>>> (indicated by a variable).
>>>>
>>>> I use the variable 'sample' to indicate the sample, but instead of
>>>> writing the command over and over for each sample, I tried to do this
>>>> with a -foreach- loop, something like this:
>>>>
>>>> egen local sample_level = levelsof(sample)
>>>>
>>>> foreach n of sample_level {
>>>> logistic outcome var1 var2 var3 if sample_level==`n', vce(cluster id)
>>>> }
>>>>
>>>> As always, I would appreciate your help.
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