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How to construct symmetric matrix from just a one half matrix

  • To: mathgroup at smc.vnet.net
  • Subject: [mg110362] How to construct symmetric matrix from just a one half matrix
  • From: dragec <culinovic at gmail.com>
  • Date: Tue, 15 Jun 2010 02:29:55 -0400 (EDT)

please help me with simple to apply function that will construct
symmetric matrix from given just a half matrix with diagonal.
Eg:

From:
1  0  0  0
2  3  0  0
4  9  5  0
2  2  3  4

To give:

1  2  4  2
2  3  9  2
4  9  5  3
2  2  3  4


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