example_vector_nearestk.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;
    
    std::vector<Pds::Vector> C={"-1 -1 -1",
                                " 1  1  1",
                                " 2  2  2",
                                " 3  3  3",
                                " 5  5  5",
                                " 7  7  7",
                                "11 11 11",
                                "13 13 13"};
    
    Pds::Vector V="4 4 4";
    
    // Print data
    for(n=0;n<C.size();n++) C[n].T().Print("C.T():\t");
    V.T().Print("V:\n");
    
    std::cout<<std::endl;
    
    // Find K nearest
    ID=V.NearestK(K,C,D2);
    
    // Print results
    for(n=0;n<ID.size();n++)
    {
        std::cout<<"<d2:"<<D2[n]<<">:";
        std::cout<<"[id:"<<ID[n]<<"]:";
        std::cout<<C[ID[n]].T();
    }
    
    return 0;
}