\(\newcommand{\W}[1]{ \; #1 \; }\) \(\newcommand{\R}[1]{ {\rm #1} }\) \(\newcommand{\B}[1]{ {\bf #1} }\) \(\newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} }\) \(\newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} }\) \(\newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} }\) \(\newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }\)
valvector_get_started.cpp¶
View page sourceGetting Started Using valvector as a CppAD Base Class¶
# include <cppad/example/valvector/class.hpp>
# include <cppad/cppad.hpp>
bool get_started(void)
{ // ok
bool ok = true;
//
// ad_valvector
typedef CppAD::AD<valvector> ad_valvector;
//
// ax
CPPAD_TESTVECTOR( ad_valvector ) ax(2);
ax[0] = valvector( {1.0} );
ax[1] = valvector( {2.0} );
CppAD::Independent(ax);
//
// f
CPPAD_TESTVECTOR( ad_valvector ) ay(1);
ay[0] = ax[0] * ax[1];
CppAD::ADFun<valvector> f(ax, ay);
//
// x
CPPAD_TESTVECTOR( valvector ) x(2);
x[0] = valvector( {1.0, 2.0, 3.0} );
x[1] = valvector( {4.0, 3.0, 2.0} );
//
// y
CPPAD_TESTVECTOR( valvector ) y(1);
y = f.Forward(0, x);
//
// ok
valvector check;
check = valvector( {4.0, 6.0, 6.0} );
ok &= y[0] == check;
//
// dw
CPPAD_TESTVECTOR( valvector ) w(1), dw(2);
w[0] = valvector( 1.0 );
dw = f.Reverse(1, w);
//
// ok
ok &= dw[0] == x[1];
ok &= dw[1] == x[0];
//
return ok;
}