Home > sgwt_toolbox > sgwt_randmat.m

sgwt_randmat

PURPOSE ^

sgwt_randmat : Compute random (Erdos-Renyi model) graph

SYNOPSIS ^

function [A]=sgwt_randmat(N,thresh)

DESCRIPTION ^

 sgwt_randmat : Compute random  (Erdos-Renyi model) graph

 function A=sgwt_randmat(N,thresh)

 Inputs : 
 N - number of vertices
 thresh - probability of connection of each edge

 Outputs :
 A - adjacency matrix

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 % sgwt_randmat : Compute random  (Erdos-Renyi model) graph
0002 %
0003 % function A=sgwt_randmat(N,thresh)
0004 %
0005 % Inputs :
0006 % N - number of vertices
0007 % thresh - probability of connection of each edge
0008 %
0009 % Outputs :
0010 % A - adjacency matrix
0011 
0012 % This file is part of the SGWT toolbox (Spectral Graph Wavelet Transform toolbox)
0013 % Copyright (C) 2010, David K. Hammond.
0014 %
0015 % The SGWT toolbox is free software: you can redistribute it and/or modify
0016 % it under the terms of the GNU General Public License as published by
0017 % the Free Software Foundation, either version 3 of the License, or
0018 % (at your option) any later version.
0019 %
0020 % The SGWT toolbox is distributed in the hope that it will be useful,
0021 % but WITHOUT ANY WARRANTY; without even the implied warranty of
0022 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0023 % GNU General Public License for more details.
0024 %
0025 % You should have received a copy of the GNU General Public License
0026 % along with the SGWT toolbox.  If not, see <http://www.gnu.org/licenses/>.
0027 
0028 function [A]=sgwt_randmat(N,thresh)
0029   assert(thresh<=1 && thresh>=0);
0030   A=rand(N)>1-thresh;
0031   B=triu(A);
0032   A=B+B';
0033   for i=1:size(A,1)
0034     A(i,i)=0;
0035   end
0036   A=sparse(A);

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