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Re: st: how to group variables into equal number groups


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: how to group variables into equal number groups
Date   Tue, 26 Mar 2013 16:30:52 +0000

-egen, group()- is absolutely no use here. (Your example is illegal,
but that is not the main point.) It can't possibly improve on -xtile-.
In fact, no -egen- function can resolve ties.

Nick

On Tue, Mar 26, 2013 at 3:01 PM, Xixi Lin <winnielxx@gmail.com> wrote:
> Hi Billy,
>
> There are some ties for some variables, will that be a big problem?
>
> Btw, do you mean egen decile=group(10)?
>
> Thanks,
> Xixi Lin
>
> On Tue, Mar 26, 2013 at 10:44 AM, William Buchanan
> <william@williambuchanan.net> wrote:
>> Why not use -egen-? Also, are there ties in the values for the variable you are trying to recode?
>>
>> HTH,
>> Billy
>>
>> Sent from my iPhone
>>
>> On Mar 26, 2013, at 7:30, Xixi Lin <winnielxx@gmail.com> wrote:
>>
>>> Hi,
>>>
>>> I am trying to make independent variables into decile groups, and I
>>> used xtile decile=x1 if Period==`z', nq(10); however, it turns out
>>> that xtile does not make equal number of the 10 groups, is there any
>>> way to force stata to divide them into equal number of obs or almost
>>> equal number of obs?
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