PCLのpcl::getMeanStdDevは不偏標準偏差を返す

#include <iostream>
#include <pcl/common/impl/common.hpp> //getMeanStdDev

#pragma comment(lib,"pcl_commond.lib")

int main()
{
  std::vector<float> v;
  v.push_back(-1.841658711);
  v.push_back(-1.449076772);
  v.push_back(-1.04681015);
  v.push_back(-0.646572888);
  v.push_back(-0.25920701);
  v.push_back(0.149769783);
  v.push_back(-1.883069754);
  v.push_back(-1.481496215);
  v.push_back(-1.083532453);

  //不偏標準偏差
  double mean, stddev;
  pcl::getMeanStdDev(v, mean, stddev);

  printf("平均：%lf\n", mean);
  printf("不偏標準偏差%lf\n", stddev);

}