mirror of
https://github.com/triqs/dft_tools
synced 2024-12-27 06:43:40 +01:00
103 lines
3.0 KiB
C++
103 lines
3.0 KiB
C++
#include <triqs/det_manip/det_manip.hpp>
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#include <triqs/mc_tools/random_generator.hpp>
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#include <triqs/arrays/linalg/det_and_inverse.hpp>
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#include <triqs/arrays/asserts.hpp>
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#include <iostream>
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struct fun {
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typedef double result_type;
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typedef double argument_type;
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double operator()(double x, double y) const { return 0.5* ( y>=x ? 1 : -1) ; }
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};
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template<class T1, class T2 >
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void assert_close( T1 const & A, T2 const & B, double precision) {
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if ( std::abs(A-B) > precision) TRIQS_RUNTIME_ERROR<<"assert_close error : "<<A<<"\n"<<B;
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}
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const double PRECISION = 1.e-12;
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struct test {
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fun f;
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triqs::det_manip::det_manip<fun> D;
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double det_old,detratio;
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test() : f(), D(f,100) {}
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void check() {
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#define PRINT_ALLL
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#ifndef PRINT_ALL
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std::cerr << "det = " << D.determinant() << " == " << double(determinant(D.matrix()))<< std::endl;
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#else
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std::cerr << "det = " << D.determinant() << " == " << double(determinant(D.matrix()))<< std::endl;
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std::cerr << "inverse_matrix = " << D.inverse_matrix() << std::endl;
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//std::cerr << "inverse inverse_matrix = " << triqs::arrays::matrix<double>(inverse(D.inverse_matrix()) ) << std::endl;
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std::cerr << "matrix = " << D.matrix() << std::endl;
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std::cerr<< triqs::arrays::matrix<double>(inverse(D.matrix()))<< std::endl;
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#endif
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assert_close(D.determinant() , 0.5, PRECISION);
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assert_close(D.determinant() , 1/determinant(D.inverse_matrix()), PRECISION);
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triqs::arrays::assert_all_close( inverse(D.matrix()) , D.inverse_matrix(), PRECISION);
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assert_close( det_old * detratio , D.determinant(), PRECISION);
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}
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void run() {
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triqs::mc_tools::random_generator RNG("mt19937", 23432);
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for (size_t i =0; i< 100; ++i) {
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std::cerr<<" ------------------------------------------------"<<std::endl;
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std::cerr <<" i = "<< i << " size = "<< D.size() << std::endl;
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// choose a move
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int mn = RNG(4);
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size_t s = D.size();
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size_t w,w1;
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det_old = D.determinant();
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detratio =1;
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double x,y,x1;
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switch(RNG(( i>10 ? 4 : 1))) {
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case 0 :
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std::cout << "Insert"<< std::endl;
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x = RNG(10.0);
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w = RNG(s);
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detratio = D.try_insert(w,w, x,x);
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break;
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case 1 :
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std::cout << "Remove"<< std::endl;
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w = RNG(s);
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if (s>0) detratio = D.try_remove(w,w);
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break;
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case 2:
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x = RNG(10.0); x1 = RNG(10.0); w = RNG(s); w1 = RNG(s+1);
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if (w !=w1) {
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std::cout << " Insert2" << std::endl;
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detratio = D.try_insert2(w,w1,w,w1, x,x1,x,x1);
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}
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break;
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case 3:
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std::cout << " Remove2" << std::endl;
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if (D.size()>=2) {
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w = RNG(s); w1 = RNG(s);
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if (w !=w1) detratio = D.try_remove2(w,w1,w,w1);
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}
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break;
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default :
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TRIQS_RUNTIME_ERROR <<" TEST INTERNAL ERROR" ;
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};
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std::cout << "about to complete ..."<< std::endl;
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D.complete_operation();
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std::cout << " .. done"<< std::endl;
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if (D.size() >0) check();
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std::cout << " check done"<< std::endl;
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}
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}
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};
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int main(int argc, char **argv) {
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test().run();
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}
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