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Re: st: -foreach- loop to fit regression at each level of a variable
From
Milena Przheska <[email protected]>
To
[email protected]
Subject
Re: st: -foreach- loop to fit regression at each level of a variable
Date
Tue, 19 Nov 2013 14:10:13 +0100
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.
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