[Octave-bug-tracker] [bug #42177] Wrong second output argument for chol of a sparse matrix

[Mike Miller]

Update of bug #42177 (project octave):

              Item Group:                    None => Incorrect Result       
                  Status:                    None => Need Info              

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Follow-up Comment #1:

Confirmed. Although the help and the different calling conventions for this
function seem somewhat convoluted, so I can't say whether it's correct or not.
Some samples from Matlab to confirm the correct behavior might be nice.

For example, with sparse input it does return an R such that R'*R == A. Should
p be non-zero only when R'*R != A, or when R is not n-by-n and upper
triangular? Neither the Octave nor Matlab help descriptions are clear or in
agreement about this, at least what I get out of reading them.

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  <http://savannah.gnu.org/bugs/?42177>

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