Container for trust region statistics. More...

#include <NOX_SolverStats.hpp>

Public Attributes
int	numCauchySteps

int	numNewtonSteps
	Number of pure Cauchy steps taken.

int	numDoglegSteps
	Number of pure Newton steps taken.

int	numTrustRegionInnerIterations
	Number of dogleg steps taken.

double	sumDoglegFractionCauchyToNewton
	Holds the sum of the value of the fraction a dogleg step took between the Cauchy and Newton directions. This is the $\gamma$ variable in the standard dogleg algorithm and the $\tau$ parameter in the inexact dogleg algorithm. A value of 0.0 is a full step in the Cauchy direction and a value of 1.0 is a full step in the Newton direction. To get the average value for a nonlinear solve, divide this value by the number of dogleg steps.

double	sumDoglegFractionNewtonLength
	Holds the sum of the values of the fraction a dogleg step took compared to the full Newton step. The fractional value is computed as $\mbox{frac} = \frac{\\| d \\|}{\\| n\\|}$ . To get the average value for a nonlinear solve, divide this value by the number of dogleg steps.