[R-sig-ME] Connectedness of rows/columns of a matrix
David.Duffy at qimr.edu.au
Thu Jul 12 02:44:57 CEST 2012
On Wed, 11 Jul 2012, Kevin Wright wrote:
> Two questions:
> 1. Is there a method to detect if the rows/columns of a matrix are
> connected by at least one path through the matrix?
> 2. More generally, is there a measure of "connectedness" of the rows/columns?
> 3. Even more generally, what techniques do people use to diagnose
The rank of the design matrix for these kinds of problems. For more
elaborate SEMs, run from different start values and get different answers
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