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RE: st: egen rowmin but not value but variable name


From   "Trelle Sven" <strelle@ctu.unibe.ch>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: egen rowmin but not value but variable name
Date   Mon, 13 Aug 2012 13:16:29 +0200

Thanks Nick, it works fine for me!
Sven

p.s. Thread closed from my side.


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox
Sent: Montag, 13. August 2012 13:03
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: egen rowmin but not value but variable name

Ties can be tracked like this

sysuse auto, clear

gen which_min = "price"
gen min = price

qui foreach v of var mpg-gear_ratio {
      replace which_min = "`v'" if `v' < min
      replace which_min = which_min + " `v'" if `v' == min
      replace min = `v' if `v' < min
}

subject to a constraint of 244 characters on the variable holding
variable names.

On Mon, Aug 13, 2012 at 11:57 AM, Phil Clayton
<philclayton@internode.on.net> wrote:
> You may also need to consider what to do about ties.
>
> Phil
>
> On 13/08/2012, at 8:53 PM, Nick Cox wrote:
>
>> Dopey example. Which is minimum of price-gear_ratio in auto data?
>>
>> sysuse auto, clear
>>
>> gen which_min = "price"
>> gen min = price
>>
>> qui foreach v of var mpg-gear_ratio {
>>      replace which_min = "`v'" if `v' < min
>>       replace min = `v' if `v' < min
>> }
>>
>> Nick
>>
>> On Mon, Aug 13, 2012 at 11:32 AM, Trelle Sven <strelle@ctu.unibe.ch>
wrote:
>>
>>> it might sound trivial but I was not able to find something in the 
>>> egen or extended macro function help:
>>>
>>> I want to create a new variable that contains the variable name that

>>> holds the minimum value over several other variables per row i.e.
>>> something like the "egen x= rowmin(y z w)" command but the created 
>>> variable should not contain the row minimum but the variable name 
>>> that contains this minimum.
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