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#include "hadamard_pt.hpp"
#include <fstream>
#include <iostream>
class MeasureEnergy : public Measurement {
public:
unsigned N;
double totalE;
MeasureEnergy() {
N = 0;
totalE = 0;
}
void after_sweep(double, double E, const Orthogonal&) override {
totalE += E;
N++;
}
double energy() const { return totalE / N; }
};
class MeasureTransitionRates : public ParallelMeasurement {
public:
std::vector<std::vector<unsigned>> nAccepted;
unsigned total_steps;
MeasureTransitionRates(unsigned n) : nAccepted(n - 1) {
total_steps = 0;
for (unsigned i = 0; i < n - 1; i++) {
nAccepted[i].resize(i + 1);
}
}
void after_step(bool accepted, unsigned i, unsigned j, double, double, const MCMC&,
const MCMC&) override {
if (accepted)
nAccepted[j - 1][i]++;
}
void after_sweep(const std::vector<MCMC>&) override { total_steps++; }
};
int main(int argc, char* argv[]) {
unsigned n_tuning = 1e2;
double β0 = 1.00;
double βf = 40.00;
unsigned num = 40;
unsigned k = 2;
double ε = 0.01;
unsigned M = 10;
unsigned N = 1e4;
int opt;
while ((opt = getopt(argc, argv, "k:b:c:n:t:N:M:e:")) != -1) {
switch (opt) {
case 'k':
k = atoi(optarg);
break;
case 'b':
β0 = atof(optarg);
break;
case 'c':
βf = atof(optarg);
break;
case 'e':
ε = atof(optarg);
break;
case 'n':
num = atof(optarg);
break;
case 't':
n_tuning = (unsigned)atof(optarg);
break;
case 'N':
N = (unsigned)atof(optarg);
break;
case 'M':
M = (unsigned)atof(optarg);
break;
default:
exit(1);
}
}
unsigned n = pow(2, k);
std::vector<Measurement*> As(num);
for (Measurement*& A : As) {
A = new MeasureEnergy();
}
MeasureTransitionRates B(num);
PT p(β0, βf, num, n, B, As);
for (MCMC& sim : p.Ms) {
sim.M = walsh(k);
}
std::cout << "Beginning " << n_tuning << " tuning steps for " << n << ".\n";
p.tune(n_tuning, ε);
std::cout << "Finished tuning, beginning " << N << " tempering updates of " << M
<< " sweeps each.\n";
p.run(N, M);
std::cout << "Finished " << n << ".\n";
std::string filename = "probs_" + std::to_string(n) + "_" + std::to_string(β0) + "_" +
std::to_string(βf) + "_" + std::to_string(num) + ".dat";
std::ifstream file(filename);
unsigned N_old = 0;
std::vector<std::vector<unsigned long>> data_old(B.nAccepted.size());
for (unsigned i = 0; i < B.nAccepted.size(); i++) {
data_old[i].resize(B.nAccepted[i].size());
}
if (file.is_open()) {
file >> N_old;
for (unsigned i = 0; i < B.nAccepted.size(); i++) {
for (unsigned j = 0; j < B.nAccepted[i].size(); j++) {
double num;
file >> num;
data_old[i][j] = num;
}
}
file.close();
}
std::ofstream file_out(filename);
file_out << N_old + B.total_steps << "\n";
for (unsigned i = 0; i < B.nAccepted.size(); i++) {
for (unsigned j = 0; j < B.nAccepted[i].size(); j++) {
file_out << std::fixed << data_old[i][j] + B.nAccepted[i][j] << " ";
}
file_out << "\n";
}
file_out.close();
std::string efilename = "energies_" + std::to_string(n) + "_" + std::to_string(β0) + "_" +
std::to_string(βf) + "_" + std::to_string(num) + ".dat";
std::ifstream efile(efilename);
unsigned Ne_old = 0;
std::vector<double> edata_old(p.As.size());
if (efile.is_open()) {
efile >> N_old;
for (unsigned i = 0; i < p.As.size(); i++) {
double num;
efile >> num;
edata_old[i] = num;
}
efile.close();
}
std::ofstream efile_out(efilename);
efile_out << Ne_old + ((MeasureEnergy*)As[0])->N << "\n";
for (unsigned i = 0; i < As.size(); i++) {
efile_out << std::fixed << edata_old[i] + ((MeasureEnergy*)As[i])->totalE << " ";
}
efile_out.close();
return 0;
}
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