I nominate:
On Wed, Nov 19, 2008 at 12:18 PM, roger koenker <[EMAIL PROTECTED]> wrote:
> Cross posting is sociopathic.
--
Sarah Goslee
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-Original Message-
From: roger koenker [mailto:[EMAIL PROTECTED]
Sent: Wednesday, November 19, 2008 10:49 PM
To: Agarwal, Rahul-A
Cc: r-help; [EMAIL PROTECTED]
Subject: Re: [R] Oja median
Cross posting is sociopathic. The Oja median _is_ robust in several
reasonable senses, but admittedly
Cross posting is sociopathic. The Oja median _is_ robust in
several reasonable senses, but admittedly not from a breakdown
perspective. There are several other options: for a good review
see, e.g. Multivariate Median, A. Niinimaa and H. Oja
Encyclopedia of Statistical Sciences
url:www.eco
i have tried the code.
The first function (which computes the Oja median) has a slight problem:
If you try four points that create a square centred at (2,2)
oja.median(cbind(c(1,3,1,3),c(1,1,3,3)))
gives (-2,-2) instead of (2,2). Probably just a sign switch somewhere.
The second function
, 2008 5:15 AM
To: Agarwal, Rahul-A
Cc: [EMAIL PROTECTED]; r-help@r-project.org;
[EMAIL PROTECTED]
Subject: Re: [R] Oja median
If you had followed the thread of the link that Richard reported you
will see an implementation for the general d-dimensional version. Of
course this isn't very spee
[EMAIL PROTECTED]
Subject: Re: [R] Oja median
Can we get the code for calculating Oja median for multivariate data
RSiteSearch("oja median") returns a link to this R-help post with code
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/12781.html
Regards,
Richie.
Math
, Hyderabad
On Net: 19 533 6363
-Original Message-
From: Martin Maechler [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 18, 2008 5:47 PM
To: Agarwal, Rahul-A
Cc: [EMAIL PROTECTED]; r-help@r-project.org
Subject: Re: [R] Oja median
>>>>> <[EMAIL PROTECTED]>
>
> <[EMAIL PROTECTED]>
> on Thu, 18 Sep 2008 05:20:56 -0400 writes:
> Hi,
> Can we get the code for calculating Oja median for
> multivariate data
Excuse me, but must you really?
The Oja median has (finite) breakdown point 2/n, i.e., is not
robust in any reasonable sen
: [R] Oja median
> Can we get the code for calculating Oja median for multivariate data
RSiteSearch("oja median") returns a link to this R-help post with code
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/12781.html
Regards,
Richie.
Mathematical Scie
> Can we get the code for calculating Oja median for multivariate data
RSiteSearch("oja median") returns a link to this R-help post with code
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/12781.html
Regards,
Richie.
Mathematical Sciences Unit
HSL
-
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