[Octave-bug-tracker] [bug #52758] signal-1.3.2 -> fracshift(x, d) don't shift, if d is an integer

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?52758>

                 Summary: signal-1.3.2 -> fracshift(x,d) don't shift, if d is
an integer
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Thu 28 Dec 2017 10:23:09 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Klaus
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.1
        Operating System: Microsoft Windows

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Details:

If x is a row vector (most used) then fracshift(x,d) is redirected to
circshift(x,d), but with a row vector the current code doesn't work. A working
code for row vectors is: circshift(x,d,2). I don't know if other input vectors
or matrices have to be considered.
Example:

d = randint (1, 1000,[-1,1]);

#dd = circshift(d,3,2);   %works
dd = fracshift(d,3);      %doesn't work
#dd = fracshift(d,3.01);  %works

[acor, lag] = xcorr(d,dd);
plot (lag, abs(acor));
xlim([-5,5]);






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