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sprank function

From: John W. Eaton
Subject: sprank function
Date: Thu, 19 Oct 2006 22:59:39 -0400

On 19-Oct-2006, David Bateman wrote:

| Please consider the attached patch that adds an sprank function to
| octave that is compatible with matlab. Note that sprank returns the
| structural rank of the matrix, rather than the numerical rank, and only
| depends of the structure of the sparse matrix that is used, which is the
| equivalent of calculating the rank without taking into account any
| floating point errors. Therefore sprank(A) >= rank(A)....

Please check in these changes.



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