cppad
  • Table of Contents
  • user_guide
    • Install
    • Theory
    • AD
    • ADFun
      • record_adfun
      • other_adfun
        • base2ad
        • json_ad_graph
        • cpp_ad_graph
          • graph_op_enum
          • cpp_graph
            • cpp_graph_ctor
            • cpp_graph_scalar
            • cpp_graph_vector
            • cpp_graph_print
              • print_graph.cpp
          • from_graph
          • to_graph
        • abs_normal_fun
      • drivers
      • Forward
      • Reverse
      • sparsity_pattern
      • sparse_derivative
      • optimize
      • FunCheck
      • check_for_nan
      • to_csrc
    • preprocessor
    • multi_thread
    • utility
    • ipopt_solve
    • Example
    • speed
  • appendix
  • Index
cppad
  • user_guide
  • ADFun
  • other_adfun
  • cpp_ad_graph
  • cpp_graph
  • cpp_graph_print
  • print_graph.cpp
  • View page source

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

print_graph.cpp

Print a C++ AD Graph: Example and Test

  • Source Code

Source Code

# include <cppad/cppad.hpp>

bool print_graph(void)
{  bool ok = true;
   using std::string;
   //
   // AD graph example
   // node_1 : p[0]
   // node_2 : p[1]
   // node_3 : x[0]
   // node_4 : p[0] + p[1]
   // node_5 : x[0] + ( p[0] + p[1] )
   // y[0]   = x[0] + ( p[0] + p[1] )
   //
   // C++ graph object
   CppAD::cpp_graph graph_obj;
   //
   // operator being used
   CppAD::graph::graph_op_enum op_enum;
   //
   // set scalars
   graph_obj.function_name_set("print_graph example");
   size_t n_dynamic_ind = 2;
   graph_obj.n_dynamic_ind_set(n_dynamic_ind);
   size_t n_variable_ind = 1;
   graph_obj.n_variable_ind_set(n_variable_ind);
   //
   // node_4 : p[0] + p[1]
   op_enum = CppAD::graph::add_graph_op;
   graph_obj.operator_vec_push_back(op_enum);
   graph_obj.operator_arg_push_back(1);
   graph_obj.operator_arg_push_back(2);
   //
   // node_5 : x[0] + ( p[0] + p[1] )
   graph_obj.operator_vec_push_back(op_enum);
   graph_obj.operator_arg_push_back(3);
   graph_obj.operator_arg_push_back(4);
   //
   // y[0]   = x[0] + ( p[0] + p[1] )
   graph_obj.dependent_vec_push_back(5);
   //
   // get output of print command
   std::stringstream os;
   graph_obj.print(os);
   //
   std::string check =
      "print_graph example\n"
      "          1      p[0]\n"
      "          2      p[1]\n"
      "          3      x[0]\n"
      "          4       add    1    2\n"
      "          5       add    3    4\n"
      "y nodes = 5\n"
   ;
   std::string str = os.str();
   ok &= str == check;
   //
   return ok;
}
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