XPRSslpgetrowinfo, XSLPgetrowinfo

Purpose

Get current row information.

Topic areas

Synopsis

int XPRSslpgetrowinfo(XPRSprob prob, int type, int row, XPRSalltype *p_info);

int XSLPgetrowinfo(XSLPprob prob, int type, int row, XSLPalltype *p_info);

Arguments

prob	The current problem
type	Type of information (see below)
row	Index of the row whose information is to be handled
p_info	Pointer to a variable to receive the information

Example

The following example prints the current penalty factor of row 1:

XPRSalltype alltype;
XPRSslpgetrowinfo(prob, XPRS_SLPROWINFO_CURRENTPENALTYFACTOR, 1, &alltype);
printf("penaltyfactor[1]=%f\n", alltype.value.real);

Further information

1. The following constants are provided for row information handling:

XPRS_SLPROWINFO_SLACK: Get the current slack value of the row
XPRS_SLPROWINFO_DUAL: Get the current dual multiplier of the row
XPRS_SLPROWINFO_NUMPENALTYERRORS: Get the number of times the penalty error vector has been active for the row
XPRS_SLPROWINFO_MAXPENALTYERROR: Get the maximum size of the penalty error vector activity for the row
XPRS_SLPROWINFO_TOTALPENALTYERROR: Get the total size of the penalty error vector activity for the row
XPRS_SLPROWINFO_CURRENTPENALTYERROR: Get the size of the penalty error vector activity in the current iteration for the row
XPRS_SLPROWINFO_CURRENTPENALTYFACTOR: Get the size of the penalty error factor for the current iteration for the row
XPRS_SLPROWINFO_PENALTYCOLUMNPLUS: Get the index of the positive penalty column for the row (+)
XPRS_SLPROWINFO_PENALTYCOLUMNPLUSVALUE: Get the value of the positive penalty column for the row (+)
XPRS_SLPROWINFO_PENALTYCOLUMNPLUSDJ: Get the reduced cost of the positive penalty column for the row (+)
XPRS_SLPROWINFO_PENALTYCOLUMNMINUS: Get the index of the negative penalty column for the row (-)
XPRS_SLPROWINFO_PENALTYCOLUMNMINUSVALUE: Get the value of the negative penalty column for the row (-)
XPRS_SLPROWINFO_PENALTYCOLUMNMINUSDJ: Get the reduced cost of the negative penalty column for the row (-)

2. This function can be used to get the current SLP iteration solution in the case where this is not available using XPRSgetsolution due to solution filtering via SLPFILTER.

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XPRSslpgetrowinfo, XSLPgetrowinfo