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Re: st: -foreach- loop to fit regression at each level of a variable
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: -foreach- loop to fit regression at each level of a variable
Date
Tue, 19 Nov 2013 13:27:21 +0000
My point was that I had already explained why -foreach- with -of- did
not work without a key word indicating list type. Also, the specific
FAQ referred to does explain at length how to approach exactly your
problem.
The Statalist FAQ does underline an expectation that people do try to
read the documentation.
Nick
[email protected]
On 19 November 2013 13:10, Milena Przheska
<[email protected]> wrote:
> Nick,
>
> Judging by your tone I realize I have wasted your patience, but my
> question was whether it is even possible to do what I wanted, because
> I just wanted to know whether I am on the right path, or trying
> something that Stata cannot accept.
>
> In any case, thank you for your reply.
>
> On Tue, Nov 19, 2013 at 1:57 PM, Nick Cox <[email protected]> wrote:
>> Please read the whole of my reply and the FAQ referred to.
>>
>> Nick
>> [email protected]
>>
>>
>> On 19 November 2013 12:47, Milena Przheska
>> <[email protected]> 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 <[email protected]> wrote:
>>>> Also, there is no legal syntax
>>>>
>>>> -egen local-
>>>> Nick
>>>> [email protected]
>>>>
>>>>
>>>> On 19 November 2013 12:42, Nick Cox <[email protected]> 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
>>>>> [email protected]
>>>>>
>>>>>
>>>>> On 19 November 2013 12:34, Milena Przheska
>>>>> <[email protected]> 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.
>> *
>> * 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/
*
* For searches and help try:
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* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/