example_matrix_knearest.cpp

 
#include <cmath>
#include <Pds/Ra>
    
int main(void)
{
    std::vector<unsigned int> ID;
    std::vector<double> D2;
    unsigned int n;
    
    unsigned int K=3;
    
    Pds::Matrix C(  "-1 -1 -1\n"
                    " 1  1  1\n"
                    " 2  2  2\n"
                    " 3  3  3\n"
                    " 5  5  5\n"
                    " 7  7  7\n"
                    "11 11 11\n"
                    "13 13 13\n");
    
    Pds::Vector V="4 4 4";
    
    // Print data
    C.Print("C:\n");
    V.T().Print("V:\n");
    
    std::cout<<std::endl;
    
    // Find K nearest
    ID=C.KNearest(K,V,D2);
    
    // Print results
    for(n=0;n<ID.size();n++)
    {
        std::cout<<"<d2:"<<D2[n]<<">:";
        std::cout<<"[id:"<<ID[n]<<"]:";
        std::cout<<C.GetRow(ID[n]);
    }
    
    return 0;
}