bpdq_generate_1d_signal : Generate random sparse signal x = bpdq_generate_1d_signal(N,K,seed) Generates N length K sparse random signal (K nonzero entries are iid zero mean Gaussian with unit variance) Inputs : N - Signal length K - sparsity seed - (optional) seed for random number generator Outputs: x- returned random signal This file is part of BPDQ Toolbox (Basis Pursuit DeQuantizer) Copyright (C) 2009, the BPDQ Team (see the file AUTHORS distributed with this library) (See the notice at the end of the file.)
0001 % bpdq_generate_1d_signal : Generate random sparse signal 0002 % 0003 % x = bpdq_generate_1d_signal(N,K,seed) 0004 % Generates N length K sparse random signal 0005 % (K nonzero entries are iid zero mean Gaussian with unit variance) 0006 % 0007 % Inputs : 0008 % N - Signal length 0009 % K - sparsity 0010 % seed - (optional) seed for random number generator 0011 % 0012 % Outputs: 0013 % x- returned random signal 0014 % 0015 % This file is part of BPDQ Toolbox (Basis Pursuit DeQuantizer) 0016 % Copyright (C) 2009, the BPDQ Team (see the file AUTHORS distributed with 0017 % this library) (See the notice at the end of the file.) 0018 0019 function x = bpdq_generate_1d_signal(N,K,seed) 0020 if (nargin==3) 0021 rand('seed',seed); 0022 randn('seed',seed); 0023 end 0024 x = zeros(N,1); 0025 pos = randperm(N); 0026 x(pos(1:K)) = randn(K,1); 0027 0028 % The BPDQ Toolbox is free software: you can redistribute it and/or modify 0029 % it under the terms of the GNU General Public License as published by 0030 % the Free Software Foundation, either version 3 of the License, or 0031 % (at your option) any later version. 0032 % 0033 % The BPDQ Toolbox is distributed in the hope that it will be useful, 0034 % but WITHOUT ANY WARRANTY; without even the implied warranty of 0035 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 0036 % GNU General Public License for more details. 0037 % 0038 % You should have received a copy of the GNU General Public License 0039 % along with The BPDQ Toolbox. If not, see <http://www.gnu.org/licenses/>.