100 lines
3.7 KiB
C++
100 lines
3.7 KiB
C++
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/********************************************************
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* ██████╗ ██████╗████████╗██╗
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* ██╔════╝ ██╔════╝╚══██╔══╝██║
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* ██║ ███╗██║ ██║ ██║
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* ██║ ██║██║ ██║ ██║
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* ╚██████╔╝╚██████╗ ██║ ███████╗
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* ╚═════╝ ╚═════╝ ╚═╝ ╚══════╝
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* Geophysical Computational Tools & Library (GCTL)
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*
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* Copyright (c) 2023 Yi Zhang (yizhang-geo@zju.edu.cn)
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*
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* GCTL is distributed under a dual licensing scheme. You can redistribute
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* it and/or modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, either version 2
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* of the License, or (at your option) any later version. You should have
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* received a copy of the GNU Lesser General Public License along with this
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* program. If not, see <http://www.gnu.org/licenses/>.
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*
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* If the terms and conditions of the LGPL v.2. would prevent you from using
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* the GCTL, please consider the option to obtain a commercial license for a
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* fee. These licenses are offered by the GCTL's original author. As a rule,
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* licenses are provided "as-is", unlimited in time for a one time fee. Please
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* send corresponding requests to: yizhang-geo@zju.edu.cn. Please do not forget
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* to include some description of your company and the realm of its activities.
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* Also add information on how to contact you by electronic and paper mail.
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******************************************************/
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/* Copyright 2013 Perttu Luukko
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* This file is part of libeemd.
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* libeemd is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* libeemd is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with libeemd. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "../lib/core.h"
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#include "../lib/io.h"
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#include "../lib/algorithm.h"
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using namespace gctl;
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const size_t ensemble_size = 250;
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const unsigned int S_number = 4;
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const unsigned int num_siftings = 50;
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const double noise_strength = 0.2;
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const unsigned long int rng_seed = 0;
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std::string outfile = "eemd_example.out";
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// An example signal to decompose
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const size_t N = 1024;
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static inline double input_signal(double x) {
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const double omega = 2*GCTL_Pi/(N-1);
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return sin(17*omega*x)+0.5*(1.0-exp(-0.002*x))*sin(51*omega*x+1);
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}
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int main(int argc, char const *argv[]) try
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{
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// Define input data
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array<double> inp(N);
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for (size_t i=0; i<N; i++)
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{
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inp[i] = input_signal((double)i);
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}
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// Run eemd
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matrix<double> outp;
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// This is just a warpper of the function eemd() from libeemd
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// IMFs are stored in rows of the output matrix in the shape of M*N
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eemd1d(inp, outp, 0, ensemble_size, noise_strength, S_number, num_siftings, rng_seed);
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std::ofstream ofile;
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open_outfile(ofile, outfile);
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size_t M = outp.row_size();
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for (size_t j=0; j<N; j++)
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{
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ofile << inp[j];
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for (size_t i=0; i<M; i++)
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{
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ofile << " " << outp[i][j];
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}
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ofile << "\n";
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}
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ofile.close();
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return 0;
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}
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catch(std::exception &e)
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{
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GCTL_ShowWhatError(e.what(), GCTL_ERROR_ERROR, 0, 0, 0);
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}
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