[Octave-bug-tracker] [bug #61907] interpn gives wrong results for complex matrices

[Christof Kaufmann]

URL:
  <https://savannah.gnu.org/bugs/?61907>

                 Summary: interpn gives wrong results for complex matrices
                 Project: GNU Octave
            Submitted by: christofkaufmann
            Submitted on: Mon 24 Jan 2022 11:04:02 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: dev
         Discussion Lock: Any
        Operating System: Any

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Details:

Interpolating complex matrices gives a default extrapolation value of NA + 0i
instead of NA + NAi. Example:

interpn (i*eye(2), 1, 0:1, "nearest")
ans =

    NA +   0i     0 +   1i

Additionally "linear" ignores the imaginary part:

interpn (i*eye(2), 1, 0:1, "linear")
ans =

    NA     0

The appended patch fixes interpn for complex matrices.



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File Attachments:


-------------------------------------------------------
Date: Mon 24 Jan 2022 11:04:02 AM UTC  Name: interpn_fix_complex1.diff  Size:
2KiB   By: christofkaufmann
Fix interpn for complex matrices - v1
<http://savannah.gnu.org/bugs/download.php?file_id=52715>

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