MathGroup Archive: March 2004 [00154]

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Creating a symmetric matrix

To: mathgroup at smc.vnet.net
Subject: [mg46853] Creating a symmetric matrix
From: Mark Coleman <mark at markscoleman.com>
Date: Thu, 11 Mar 2004 03:50:43 -0500 (EST)
Sender: owner-wri-mathgroup at wolfram.com

Greetings,

How can I efficiently build a symmetric matrix from an upper triangular 
one, i.e., extract the upper triangular elements and insert them into 
the lower triangle in such a way as to make the resulting square matrix 
symmetric?

Thanks,

Mark

Follow-Ups:
- Re: Creating a symmetric matrix
  - From: "Sseziwa Mukasa,,(978) 536-2359" <mukasa@jeol.com>
- Re: Creating a symmetric matrix
  - From: Oleksandr Pavlyk <pavlyk@phys.psu.edu>
- Re: Creating a symmetric matrix
  - From: Andrzej Kozlowski <akoz@mimuw.edu.pl>

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