本文整理汇总了C++中CppAD::PrintFor方法的典型用法代码示例。如果您正苦于以下问题:C++ CppAD::PrintFor方法的具体用法?C++ CppAD::PrintFor怎么用?C++ CppAD::PrintFor使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类CppAD
的用法示例。
在下文中一共展示了CppAD::PrintFor方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: print_for
bool print_for(void)
{ bool ok = true;
using CppAD::PrintFor;
std::stringstream stream_out; // stream that output is written to
std::string string_check; // what we expect the output to be
// independent variable vector
size_t n = 1;
CPPAD_TESTVECTOR(AD<double>) ax(n);
ax[0] = 1.;
Independent(ax);
// print a VecAD<double>::reference object that is a parameter
CppAD::VecAD<double> av(1);
AD<double> Zero(0);
av[Zero] = 0.;
PrintFor("v[0] = ", av[Zero]);
string_check += "v[0] = 0"; // v[0] == 0 during Forward(0, x)
// Print a newline to separate this from previous output,
// then print an AD<double> object that is a variable.
PrintFor("\nv[0] + x[0] = ", av[0] + ax[0]);
string_check += "\nv[0] + x[0] = 2"; // x[0] == 2 during Forward(0, x)
// A conditional print that will not generate output when x[0] = 2.
PrintFor(ax[0], "\n 2. + x[0] = ", 2. + ax[0], "\n");
// A conditional print that will generate output when x[0] = 2.
PrintFor(ax[0] - 2., "\n 3. + x[0] = ", 3. + ax[0], "\n");
string_check += "\n 3. + x[0] = 5\n";
// A log evaluations that will result in an error message when x[0] = 2.
AD<double> var = 2. - ax[0];
AD<double> log_var = check_log(var);
string_check += "check_log: y == 0 which is <= 0\n";
// dependent variable vector
size_t m = 2;
CPPAD_TESTVECTOR(AD<double>) ay(m);
ay[0] = av[Zero] + ax[0];
// define f: x -> y and stop tape recording
CppAD::ADFun<double> f(ax, ay);
// zero order forward with x[0] = 2
CPPAD_TESTVECTOR(double) x(n);
x[0] = 2.;
f.Forward(0, x, stream_out);
std::string string_out = stream_out.str();
ok &= string_out == string_check;
return ok;
}