VTK/Examples/Cxx/Utilities/SparseArray

#include <vtkSmartPointer.h>
#include <vtkSparseArray.h>
 
int main(int, char *[])
{
  vtkSmartPointer<vtkSparseArray<double> > array =
    vtkSmartPointer<vtkSparseArray<double> >::New();
  array->Resize(5,1);
  array->SetNullValue(-1);
 
  for(unsigned int i = 0; i < 5; i++)
    {
    array->SetValue(i, 0, i);
    }
 
  for(unsigned int i = 0; i < 6; i++)
    {
    double val = array->GetValue(i,0);
    std::cout << val << std::endl;
    }
 
  return EXIT_SUCCESS;
}