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VectorUtilities.hh File Reference

Supports vector classes. More...

#include <iostream>

Go to the source code of this file.

Compounds
struct	IotrVectorDisplayFormat
	A struct whose instances specify an ASCII format for displaying the elements of a vector. More...
Functions
void	set_to_zero (double v[], int n, int stride)
	Sets v = 0.
void	writef_to_stream (const double v[], int n, int stride, std::ostream &out, const char *formatString)
	Prints out v subject to a format.
void	set_to_constant (double v[], int n, int stride, double c)
	Sets v = c.
void	add_constant (double v[], int n, int stride, double c)
	Sets v += c.
double	stepbound (const double v[], int n, int incv, const double s[], int incs, double max)
	Return max alpha such that v+alpha*s >= 0.
double	stepbound (const double v[], int n, int incv, const double s[], int incs, const double b[], int nb, int incb, const int ib[], int nib, const double u[], int nu, int incu, const int iu[], int niu, double max)
	Return max alpha such that b <= v+alpha*s <= u.
void	make_sufficiently_positive (double x[], int n, int incx, double atol)
	make all elements of x greater than atol, leaving those already greater untouched.
void	make_interior (double x[], int n, int incx, const double xlow[], int nxlow, int incxlow, const int ixlow[], int nixlow, const double xupp[], int nxupp, int incupp, const int ixupp[], int nixupp, double rtol, double atol)
	Make all elements of x interior to the bounds, leaving those already "sufficiently" interior untouched.
double	max_violation (double v[], int length, int stride, double viol)
	Computes the max violation of [ v; -viol ] >= 0.

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Detailed Description

Supports vector classes.

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Function Documentation

void make_interior (  double    x[], int    n, int    incx, const double    xlow[], int    nxlow, int    incxlow, const int    ixlow[], int    nixlow, const double    xupp[], int    nxupp, int    incupp, const int    ixupp[], int    nixupp, double    rtol, double    atol )

Make all elements of x interior to the bounds, leaving those already "sufficiently" interior untouched. An element of x with only a lower bound is sufficiently interior if x[i] > b + atol. Otherwise it is set to b + atol. Treatment of elements with only upper bounds is similar. If an element has both upper and lower bounds, it is considered to be sufficiently interior if b + tol <= x[i] <= u - tol where tol = min[ atol, rtol * (u - b) ] If it is not sufficiently interior, we make the smallest change that will make the element sufficiently interior.

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