XPRScalcsolinfo

Purpose

Calculates the required property of a solution, like maximum infeasibility of a given primal and dual solution.

Synopsis

int XPRS_CC XPRScalcsolinfo(XPRSprob prob, const double solution[], const double dual[], int Property, double* Value);

Arguments

prob

The current problem.

solution

Double array of length COLS that holds the solution.

dual

Double array of length ROWS that holds the dual solution.

Property

XPRS_SOLINFO_ABSPRIMALINFEAS	the calculated maximum absolute primal infeasibility is returned.
XPRS_SOLINFO_RELPRIMALINFEAS	the calculated maximum relative primal infeasibility is returned.
XPRS_SOLINFO_ABSDUALINFEAS	the calculated maximum absolute dual infeasibility is returned.
XPRS_SOLINFO_RELDUALINFEAS	the calculated maximum relative dual infeasibility is returned.
XPRS_SOLINFO_MAXMIPFRACTIONAL	the calculated maximum absolute MIP fractionality or SOS infeasibility.
XPRS_SOLINFO_ABSMIPINFEAS	the calculated maximum absolute MIP infeasibility (including delayed rows, indicators, general and piecewise linear constraints) is returned.
XPRS_SOLINFO_RELMIPINFEAS	the calculated maximum relative MIP infeasibility (including delayed rows, indicators, general and piecewise linear constraints) is returned.

Value

Pointer to a double where the calculated value is returned.

Further information

The calculations are always carried out in the original problem, even if the problem is currently presolved.