Source: mat_sum

mat_sum_sq.hpp

Headings

@(@\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}} }@)@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

Input File: omh/mat_sum_sq_hpp.omh