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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 2008-2009 - INRIA - Michael Baudin
// Copyright (C) 2009-2010 - DIGITEO - Michael Baudin
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
//
// optimsimplex_dirmat --
// Returns the n x n matrix of simplex directions i.e.
// the matrix of differences of vertices coordinates
// with respect to the vertex #1.
// Arguments
// <no arg>
//
function m = optimsimplex_dirmat ( this )
nv = this.nbve;
v1 = this.x(1,1:this.n);
m(1:this.n,1:nv-1) = (this.x(2:nv,1:this.n) - v1 .*. ones(nv-1,1)).';
endfunction
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