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#ifndef __CGLA_STATISTICS_H__
#define __CGLA_STATISTICS_H__

#include <vector>

namespace CGLA
{
  template<class VT>
    VT mean(const std::vector<VT>& vec)
    {
      VT v(0);
      for(int i=0;i<vec.size();++i)
        v += vec[i];
      v /= vec.size();

      return v;
    }


  /** Function that computes the covariance of a set of points.
      This function returns the mean, and, upon completion, the
      final argument contains the covariance matrix.

      This template is instantiated for Vec3f, Vec2f, and Vec4f. */
                        
  template<class VT, class MT>
    VT covariance(const std::vector<VT>& vec, MT& C_out);
}




#endif