\(\newcommand{\W}[1]{ \; #1 \; }\) \(\newcommand{\R}[1]{ {\rm #1} }\) \(\newcommand{\B}[1]{ {\bf #1} }\) \(\newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} }\) \(\newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} }\) \(\newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} }\) \(\newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }\)
integer.cpp¶
View page sourceConvert From AD to Integer: Example and Test¶
# include <cppad/cppad.hpp>
bool Integer(void)
{ bool ok = true;
using CppAD::AD;
using CppAD::Integer;
// domain space vector
size_t n = 2;
CPPAD_TESTVECTOR(AD<double>) x(n);
x[0] = 3.5;
x[1] = 4.5;
// check integer before recording
ok &= (Integer(x[0]) == 3);
ok &= (Integer(x[1]) == 4);
// start recording
// declare independent variables and start tape recording
CppAD::Independent(x);
// check integer during recording
ok &= (Integer(x[0]) == 3);
ok &= (Integer(x[1]) == 4);
// check integer for VecAD element
CppAD::VecAD<double> v(1);
AD<double> zero(0);
v[zero] = 2;
ok &= (Integer(v[zero]) == 2);
// range space vector
size_t m = 1;
CPPAD_TESTVECTOR(AD<double>) y(m);
y[0] = - x[1];
// create f: x -> y and stop recording
CppAD::ADFun<double> f(x, y);
// check integer after recording
ok &= (Integer(x[0]) == 3.);
ok &= (Integer(x[1]) == 4.);
ok &= (Integer(y[0]) == -4.);
return ok;
}