[Octave-bug-tracker] [bug #45877] mahalanobis is wrong (and probably belongs to the statistics package)

[Carnë Draug]

URL:
  <http://savannah.gnu.org/bugs/?45877>

                 Summary: mahalanobis is wrong (and probably belongs to the
statistics package)
                 Project: GNU Octave
            Submitted by: carandraug
            Submitted on: Fri 04 Sep 2015 06:19:20 PM GMT
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

The function mahalanobis doesn't seem to work at all (note that it should
return one value for each row of X).


octave> X = rand (10, 2);
octave> Y = rand (4, 2);
octave> mahalanobis (X, Y)
ans =  2.6666


I'm unsure since when it stopped working but the 7 tests it has, only check
that it returns an error when input is complete garbage.

In a separate note, this function actually belongs to the statistics package
named mahal.




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