Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: lower diagonal matrix


From   brendan.halpin@ul.ie (Brendan Halpin)
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: lower diagonal matrix
Date   Fri, 09 Dec 2011 09:34:19 +0000

On Fri, Dec 09 2011, María Fernanda Rosales Rueda wrote:

> I need to convert a lower diagonal matrix into a symmetric matrix. How
> can I do this in stata?


----------------------------------------------------------------------
#delimit ;
matrix x =(0.10, 0.00, 0.00, 0.00\
           0.50, 0.20, 0.00, 0.00\
           0.60, 0.64, 0.30, 0.00\
           0.65, 0.61, 0.65, 0.40);
#delimit cr


mata:
X = lowertriangle(st_matrix("x"))
Y = X + X'
st_matrix("y",Y)
end

matrix list y
----------------------------------------------------------------------

Brendan
-- 
Brendan Halpin,   Department of Sociology,   University of Limerick,   Ireland
Tel: w +353-61-213147  f +353-61-202569  h +353-61-338562;  Room F1-009 x 3147
mailto:brendan.halpin@ul.ie    ULSociology on Facebook: http://on.fb.me/fjIK9t
http://teaching.sociology.ul.ie/bhalpin/wordpress         twitter:@ULSociology

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index