[R] Coerce rectangular matrix to symmetrical square matrix

[Nathan S. Watson-Haigh]

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I have a rectangular matrix of size 920 by 85. I'd like to coerce it into a
square matrix such that all row/col names are present in the new matrix and the
additional values are zero.

As an example:

   A  B  C  D
A  1  2  3  4
E  5  6  7  8
F  9 10 11 12

Would be coerced to:
   A  B  C  D  E  F
A  1  2  3  4  5  9
B  2  0  0  0  6 10
C  3  0  0  0  7 11
D  4  0  0  0  8 12
E  5  6  7  8  0  0
F  9 10 11 12  0  0

Any thoughts on how to achieve this?

Cheers,
Nathan


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Dr. Nathan S. Watson-Haigh
OCE Post Doctoral Fellow
CSIRO Livestock Industries
Queensland Bioscience Precinct
St Lucia, QLD 4067
Australia

Tel: +61 (0)7 3214 2922
Fax: +61 (0)7 3214 2900
Web: http://www.csiro.au/people/Nathan.Watson-Haigh.html
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