[Octave-bug-tracker] [bug #58342] zplane not returning handles

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?58342>

                 Summary: zplane not returning handles
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Sat 09 May 2020 06:37:23 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: address@hidden
             Open/Closed: Open
                 Release: 4.2.2
         Discussion Lock: Any
        Operating System: GNU/Linux

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Details:

I have found a discrepancy between the matlab specification and
the octave implementation of the zplane function, found in the signal
package.

The octave implementation does not give any output values, but matlab does:

[hz,hp,ht] = zplane(___) returns vectors of handles to the zero lines, hz, and
the pole lines, hp. ht is a vector of handles to the axes/unit circle line and
to text objects, which are present when there are multiple zeros or poles./

https://se.mathworks.com/help/signal/ref/zplane.html#d120e189724

When I try to do e.g.

[hz,hp,ht] = zplane([0; 1; 1i], [0.3; 0.1])

The error

error: element number 1 undefined in return list

is printed. This should be a valid expression.




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