@(@\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}} }@)@
This is cppad-20221105 documentation. Here is a link to its
current documentation
.
nan: Example and Test
# include <cppad/utility/nan.hpp>
# include <vector>
# include <limits>
bool nan(void)
{ bool ok = true;
// get a nan
double double_zero = 0.;
double double_nan = std::numeric_limits<double>::quiet_NaN();
// create a simple vector with no nans
std::vector<double> v(2);
v[0] = double_zero;
v[1] = double_zero;
// check that zero is not nan
ok &= ! CppAD::isnan(double_zero);
ok &= ! CppAD::hasnan(v);
// check that nan is a nan
v[1] = double_nan;
ok &= CppAD::isnan(double_nan);
ok &= CppAD::hasnan(v);
// check that nan is not equal to itself
ok &= (double_nan != double_nan);
return ok;
}
