[Octave-bug-tracker] [bug #62132] interp2 may produce incorrectly oriented result with "spline" option

[John W. Eaton]

URL:
  <https://savannah.gnu.org/bugs/?62132>

                 Summary: interp2 may produce incorrectly oriented result with
"spline" option
                 Project: GNU Octave
            Submitted by: jwe
            Submitted on: Wed 02 Mar 2022 08:43:48 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: jwe
        Originator Email: 
             Open/Closed: Open
                 Release: dev
         Discussion Lock: Any
        Operating System: Any

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Details:

I'm creating this bug report in part to be able to assign a bug report for a
test in interp2.m

I see the following:


octave:1> z = [1 3 5; 3 5 7; 5 7 9];
octave:2> interp2 (z, [3;3;3], [2;3;1])
ans =

   7
   9
   5

octave:3> interp2 (z, [3;3;3], [2;3;1], "spline")
ans =

   7   9   5


Shouldn't the orientation of these be the same (presumably a column vector)
regardless of the interpolation method?

See also bug #61754.




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