[Octave-bug-tracker] [bug #49570] datenum gives incorrect results for month > 14

[Markus Mützel]

URL:
  <http://savannah.gnu.org/bugs/?49570>

                 Summary: datenum gives incorrect results for month > 14
                 Project: GNU Octave
            Submitted by: mmuetzel
            Submitted on: Wed 09 Nov 2016 05:33:56 PM GMT
                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
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

While Matlab accepts months > 14 as an input to datenum moving those months to
the subsequent years, Octave wraps them back one year (minus February).

Example in Octave:

>> datenum (4, 10:16,1)
ans =
   1736   1767   1797   1828   1859   1522   1553

>> diff (ans)
ans =
    31    30    31    31  -337    31


In Matlab:

>> datenum (4, 10:16,1)
ans =
        1736        1767        1797        1828        1859        1887      
 1918

>> diff (ans)
ans =
    31    30    31    31    28    31






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