[Octave-bug-tracker] [bug #55570] quiver3 gives error for 3 inputs

[Doug Stewart]

URL:
  <https://savannah.gnu.org/bugs/?55570>

                 Summary: quiver3 gives error for 3 inputs
                 Project: GNU Octave
            Submitted by: dastew
            Submitted on: Fri 25 Jan 2019 02:24:36 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error
                  Status: None
             Assigned to: None
         Originator Name: doug Stewart
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 5.0.1
        Operating System: Any

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Details:

The help screen says that it can take 3 inputs
: quiver3 (u, v, w)

but it does not work.
If we take the example from the help documentation



1[x, y, z] = peaks (25);
surf (x, y, z);
hold on;
[u, v, w] = surfnorm (x, y, z / 10);
h = quiver3 (x, y, z, u, v, w);
set (h, "maxheadsize", 0.33);



it works. But now to test the three input mode try:
h = quiver3 (u, v, w);

this errors with a very unusual error message:


stopped in /usr/local/share/octave/5.0.1/m/plot/draw/quiver3.m at line 81
81:   oldfig = [];
debug>
error: __quiver__: operator +: nonconformant arguments (op1 is 15625x1, op2 is
625x1)
error: called from
    __quiver__ at line 197 column 10
    quiver3 at line 87 column 10
    testquiver3 at line 5 column 3





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