\(\newcommand{\W}[1]{ \; #1 \; }\) \(\newcommand{\R}[1]{ {\rm #1} }\) \(\newcommand{\B}[1]{ {\bf #1} }\) \(\newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} }\) \(\newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} }\) \(\newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} }\) \(\newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }\)
print_graph.cpp¶
View page sourcePrint a C++ AD Graph: Example and Test¶
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;
}