gsp_check_fourier.m
2cb18aae5832master

gsp_check_fourier.m
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			function bool = gsp_check_fourier(G)
			%GSP_CHECK_FOURIER Check is the Fourier basis is computed
			% Usage: bool = gsp_check_fourier(G):
			%
			% Input parameters:
			% G : Graph structure
			% Output parameters:
			% bool : boolean
			%
			% This function check is the Laplacian eigenvalues and eigenfunctions are
			% computed.
			%
			%
			% Url: http://lts2research.epfl.ch/gsp/doc/utils/gsp_check_fourier.php

			% Copyright (C) 2013-2016 Nathanael Perraudin, Johan Paratte, David I Shuman.
			% This file is part of GSPbox version 0.7.0
			%
			% 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 3 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/>.

			% If you use this toolbox please kindly cite
			% N. Perraudin, J. Paratte, D. Shuman, V. Kalofolias, P. Vandergheynst,
			% and D. K. Hammond. GSPBOX: A toolbox for signal processing on graphs.
			% ArXiv e-prints, Aug. 2014.
			% http://arxiv.org/abs/1408.5781

			bool = ( isfield(G,'e') && isfield(G,'U') );

			end