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st: di-graphs for sppack
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st: di-graphs for sppack
Date
Mon, 13 Jun 2011 09:21:02 -0500
Laszlo Sandor <[email protected]> asked if it was possible to use the
user-written -sppack- routines with nonsymmetric matrices:
> I have hopes to use -sppack- with a graph that is essentially directed....
> In the end, the resulting correlation matrix cannot by symmetric. Is it a
> problem for -spreg-?
-spmat-, -spreg-, and -spivreg- can handle nonsymmetric matrices. This is
implied in section 2.5, Normalization methods, of the spmat working paper
available at
http://econweb.umd.edu/~prucha/Papers/WP_spmat_2011.pdf
--Rafal
[email protected]
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