[Octave-bug-tracker] [bug #51583] eig(L, 'vector') fails on Octave - works on Matlab

[Tom]

URL:
  <http://savannah.gnu.org/bugs/?51583>

                 Summary: eig(L,'vector') fails on Octave - works on Matlab
                 Project: GNU Octave
            Submitted by: madtom1999
            Submitted on: Wed 26 Jul 2017 11:50:48 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.0
        Operating System: GNU/Linux

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Details:

The following code works fine on Matlab but fails on Octave: 
-----------------------------------------------------------
% Form the matrix of weights based on the graph
N = 11;
W = zeros(N,N);
W(1,2) = 0.5;
W(1,5) = 0.5;
W(2,3) = 0.6;
W(3, 4) = 0.6;
W(4,5) = 0.6;
W(4,6) = 0.1;
W(5, 7) = 0.2;
W(6,7) = 0.8;
W(7,8) = 0.4;
W(8,9) = 0.5;
W(9,10) = 0.7;
W(10,11) = 0.7;
W(11,6) = 0.8;
% Since it's undirected add on the transpose to assign the edges in the
% other direction
W = W + W';
% Examine the structure of the weights matrix
spy(W)
% Form the degree matrix, D
D = diag(sum(W,2));
% Form the Laplacian
L = D - W;
% Find the eigenvectors and eigenvalues
[evec,eval] = eig(L, 'vector');
error: eig: wrong type argument 'sq_string'
---------------------------------------------
using [evec,eval] = eig(L, "vector");
error: eig: wrong type argument 'string'
---------------------------------------------
Tom





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