\(\newcommand{\W}[1]{ \; #1 \; }\) \(\newcommand{\R}[1]{ {\rm #1} }\) \(\newcommand{\B}[1]{ {\bf #1} }\) \(\newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} }\) \(\newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} }\) \(\newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} }\) \(\newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }\)

mat_sum_sq.hpp

View page source

Source: mat_sum_sq

# ifndef CPPAD_MAT_SUM_SQ_HPP

# define CPPAD_MAT_SUM_SQ_HPP

# include <cstddef>
//
namespace CppAD {
   template <class Vector>
   void mat_sum_sq(size_t n, Vector& x , Vector& y , Vector& z)
   {  size_t i, j, k;
      // Very simple computation of y = x * x for speed comparison
      for(i = 0; i < n; i++)
      {  for(j = 0; j < n; j++)
         {  y[i * n + j] = 0.;
            for(k = 0; k < n; k++)
               y[i * n + j] += x[i * n + k] * x[k * n + j];
         }
      }
      z[0] = 0.;
      for(i = 0; i < n; i++)
      {  for(j = 0; j < n; j++)
            z[0] += y[i * n + j];
      }
      return;
   }

}

# endif