% Create diagonal sparse matrix.
%
% s = sparse_diag(d)
%
% Create diagonal sparse matrix s based on the diagonal elements d. The 
% parameter d is transformed into a vector.

function s = sparse_diag(d)

s = spdiags(d(:),0,numel(d),numel(d));

% Copyright (C) 2009 Alexander Barth <a.barth@ulg.ac.be>
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; If not, see <http://www.gnu.org/licenses/>.

