本文整理汇总了C++中VectorValues::squaredNorm方法的典型用法代码示例。如果您正苦于以下问题：C++ VectorValues::squaredNorm方法的具体用法？C++ VectorValues::squaredNorm怎么用？C++ VectorValues::squaredNorm使用的例子？那么恭喜您, 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VectorValues的用法示例。
在下文中一共展示了VectorValues::squaredNorm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: ComputeDoglegPoint
/* ************************************************************************* */
VectorValues DoglegOptimizerImpl::ComputeDoglegPoint(
double delta, const VectorValues& dx_u, const VectorValues& dx_n, const bool verbose) {
// Get magnitude of each update and find out which segment delta falls in
assert(delta >= 0.0);
double deltaSq = delta*delta;
double x_u_norm_sq = dx_u.squaredNorm();
double x_n_norm_sq = dx_n.squaredNorm();
if(verbose) cout << "Steepest descent magnitude " << std::sqrt(x_u_norm_sq) << ", Newton's method magnitude " << std::sqrt(x_n_norm_sq) << endl;
if(deltaSq < x_u_norm_sq) {
// Trust region is smaller than steepest descent update
VectorValues x_d = std::sqrt(deltaSq / x_u_norm_sq) * dx_u;
if(verbose) cout << "In steepest descent region with fraction " << std::sqrt(deltaSq / x_u_norm_sq) << " of steepest descent magnitude" << endl;
return x_d;
} else if(deltaSq < x_n_norm_sq) {
// Trust region boundary is between steepest descent point and Newton's method point
return ComputeBlend(delta, dx_u, dx_n, verbose);
} else {
assert(deltaSq >= x_n_norm_sq);
if(verbose) cout << "In pure Newton's method region" << endl;
// Trust region is larger than Newton's method point
return dx_n;
}
}