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Re: st: Calculate average elements matrix (below the diagonal )


From   John Antonakis <John.Antonakis@unil.ch>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Calculate average elements matrix (below the diagonal )
Date   Tue, 11 Sep 2012 11:51:25 +0200

That brilliant!

Thanks. Nick.

Best,
J.

__________________________________________

Prof. John Antonakis
Faculty of Business and Economics
Department of Organizational Behavior
University of Lausanne
Internef #618
CH-1015 Lausanne-Dorigny
Switzerland
Tel ++41 (0)21 692-3438
Fax ++41 (0)21 692-3305
http://www.hec.unil.ch/people/jantonakis

Associate Editor
The Leadership Quarterly
__________________________________________

On 11.09.2012 11:28, Nick Cox wrote:
> There are probably more elegant ways to do it, but this works:
>
> sysuse auto
> corr price mpg rep78
> mata
> C = st_matrix("r(C)")
> mean(abs(select(vech(C), vech(C) :< 1)))
>
>
> On Tue, Sep 11, 2012 at 9:34 AM, John Antonakis <John.Antonakis@unil.ch> wrote:
>
>> I would like to calculate the average absolute correlations of a correlation
>> matrix.  E.g.,
>>
>> sysuse auto
>> corr price mpg rep78
>> mat A = r(C)
>> mat list A
>>
>> This returns the following three correlations below the diagonal:
>>
>> -.45594895 .00655327 .40234039
>>
>> Specifically, I would like to: obtain the average absolute values of the
>> below-diagonal elements:
>>
>> i.e., dis (abs(-.45594895) + abs(.00655327) + abs(.40234039))/3
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