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RE: st: how to exclude an observation when calculating the median of a group
From
Joe Canner <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: how to exclude an observation when calculating the median of a group
Date
Mon, 7 Oct 2013 12:54:09 +0000
Nahla,
There was a question similar to this not long ago: http://www.stata.com/statalist/archive/2013-09/msg00744.html where several possible solutions were provided. See if this helps and let us know if not.
Regards,
Joe Canner
Johns Hopkins University School of Medicine
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Nahla Betelmal
Sent: Monday, October 07, 2013 7:38 AM
To: [email protected]
Subject: Re: st: how to exclude an observation when calculating the median of a group
Thank, I used this link before when I wanted to calculate the mean ( by subtracting each observation from the total) and dvide by n-1.
However, I could not figure out a way how to do it for the median!
Thanks again
Nahla
On 7 October 2013 12:16, Nick Cox <[email protected]> wrote:
> This is a FAQ, itself frequently cited on this list.
>
> FAQ . . Creating variables recording prop. of the other members of a group
> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox
> 4/05 How do I create variables summarizing for each
> individual properties of the other members of a
> group?
> http://www.stata.com/support/faqs/data-management/
> creating-variables-recording-properties/
>
> Nick
> [email protected]
>
> On 7 October 2013 11:53, Nahla Betelmal <[email protected]> wrote:
>
>> I wonder how to exclude an observation when calculating the median of
>> a group. In other words I want to calculate the median of variable X
>> for firms in a specific year and specific industry, however, I want
>> to exclude each firm observation when calculating the median.
>>
>> if there are 6 firms in a certain industry/year. The median will be
>> calculated based on the other 4 non missing firms observations
>>
>> Firm VarX Mediam_VarX
>> 1 10 based on firms 2,3,4,5 only
>> 2 8 based on firms 1,3,4,5 only
>> 3 12 based on firms 1,2,4,5 only
>> 4 14 based on firms 1,2,3,5 only
>> 5 10 based on firms 1,2,3,4 only
>> 6 missing .
>>
>> I am stuck with the command for the part of excluding each firm
>> observation, It would be great if someone can help in that.
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