[Octave-bug-tracker] [bug #50583] Empty arguments to some simple functions give inconsistent results to Matlab

[Ceral Paquet]

URL:
  <http://savannah.gnu.org/bugs/?50583>

                 Summary: Empty arguments to some simple functions give
inconsistent results to Matlab
                 Project: GNU Octave
            Submitted by: octavebugs
            Submitted on: Sat 18 Mar 2017 09:25:07 PM UTC
                Category: None
                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: 4.2.1
        Operating System: GNU/Linux

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Details:

MATLAB 2016a:

>> median([])

ans =

   NaN

>> std([])

ans =

   NaN

>> var([])

ans =

   NaN

>> mode([])
Warning: MODE of a 0-by-0 matrix is NaN; result was an empty matrix in
previous releases. 
> In mode (line 72) 

ans =

   NaN

>> cov([])

ans =

   NaN



Octave 4.2.1:

>> median([])
error: median: X cannot be an empty matrix
error: called from
    median at line 67 column 5
>> std([])
ans = [](0x0)
>> var([])
error: var: X must not be empty
error: called from
    var at line 103 column 5
>> mode([])
ans = [](1x0)
>> cov([])
ans = [](0x0)






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