[Octave-bug-tracker] [bug #50673] 'datestr' gives wrong result. Possibly a rounding issue

[Luis Mendo]

URL:
  <http://savannah.gnu.org/bugs/?50673>

                 Summary: 'datestr' gives wrong result. Possibly a rounding
issue
                 Project: GNU Octave
            Submitted by: lmendo
            Submitted on: Wed 29 Mar 2017 08:26:18 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: Luis Mendo
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.3
        Operating System: Any

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Details:

This code


datestr(datenum('1:00')-datenum('0:55'))


gives


ans =  0:04 AM


instead of the expected


ans =  0:05 AM


It seems to be a rounding issue with datestr, because


datestr(datenum('1:00')-datenum('0:55')+1e-10)


does give


ans =  0:05 AM





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