[Octave-bug-tracker] [bug #33883] unwrap works correctly only if the deltas <4*pi

[Benja Krieg]

URL:
  <http://savannah.gnu.org/bugs/?33883>

                 Summary: unwrap works correctly only if the deltas <4*pi
                 Project: GNU Octave
            Submitted by: zhop
            Submitted on: Птн 29 Июл 2011 11:39:03
                Category: Libraries
                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: 3.4.2
        Operating System: GNU/Linux

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Details:

The function must be idempotent per definition

============
-- Function File: B = unwrap (X, TOL, DIM)
     Unwrap radian phases by adding multiples of 2*pi as appropriate to
     remove jumps greater than TOL.  TOL defaults to pi.
============

but:

octave:62> unwrap([0 6*pi])
ans =

    0.00000   12.56637

octave:63> unwrap(unwrap([0 6*pi]))
ans =

   0.00000   6.28319

octave:64> unwrap(unwrap(unwrap([0 6*pi])))
ans =

   0   0

octave:65> 







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