[Octave-bug-tracker] [bug #54974] [octave forge] (image) incompatible results of entropy.m

[Hartmut]

URL:
  <https://savannah.gnu.org/bugs/?54974>

                 Summary: [octave forge] (image) incompatible results of
entropy.m
                 Project: GNU Octave
            Submitted by: hardy
            Submitted on: Tue 06 Nov 2018 08:05:58 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.4.1
        Operating System: Any

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Details:

The results of entropy.m in the image package don't seem to be very Matlab
compatible.

Here is a small example:

G = [-1 2 7; -5 2 8; -7 pi 9]
entropy(G)


>From another bug report (on entropyfilt, see patch #9235) I assume that the
Matlab result on this will be 0.9183. But the current (image 2.8.0 release)
Octave output is 2.9477.




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