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st: RE: computing the inverse square root of a matrix


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: computing the inverse square root of a matrix
Date   Wed, 26 Nov 2003 13:38:02 -0000

Jeff Pitblado has a program on the StataCorp website. 

. findit root matrix 

Nick 
n.j.cox@durham.ac.uk 

Elizabeth Bruch
 
> I need to compute the inverse square root of a dispersion 
> matrix, e.g., 
> X^(-1/2), where X is a square matrix. Does anyone know how 
> to compute the 
> inverse square root of a matrix in Stata? I cannot seem to 
> find any info on 
> this either the programming manual or the matrix 
> information in the User's Guide.

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