[Octave-bug-tracker] [bug #57145] Matlab heuristic for backslash and overdetermined

[Kai Torben Ohlhus]

Update of bug #57145 (project octave):

                Category:                    None => Octave Function        
                Severity:              3 - Normal => 1 - Wish               
                Priority:              5 - Normal => 3 - Low                
              Item Group:                    None => Matlab Compatibility   
                  Status:                    None => Wont Fix               
             Open/Closed:                    Open => Closed                 
                 Summary:      backslash vs. pinv => Matlab heuristic for
backslash and overdetermined 

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Follow-up Comment #3:

Thank you for the pointer in comment #2 and comment #3.  Agree to the wiki:
well defined behavior is preferable to an undocumented heuristic.

> If A is a rectangular m-by-n matrix with m ~= n, and B is a matrix with m
rows, then A\B returns a least-squares solution to the system of equations
A*x= B.

> If the rank of A is less than the number of columns in A, then x = A\B is
not necessarily the minimum norm solution.

https://www.mathworks.com/help/matlab/ref/mldivide.html

If anyone wants to figure out Matlab's heuristic, we can open this item again.

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  <https://savannah.gnu.org/bugs/?57145>

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