Initializing help system before first use

XPRSslpgetcolinfo, XSLPgetcolinfo

Purpose
Get current column information.
Topic areas
SLP, Solution
Synopsis
int XPRSslpgetcolinfo(XPRSprob prob, int type, int col, XPRSalltype *p_info);

int XSLPgetcolinfo(XSLPprob prob, int type, int col, XSLPalltype *p_info);
Arguments
prob 
The current problem
type 
Type of information (see below)
col 
Index of the column, in the current (presolved) problem, whose information is to be handled
p_info 
Pointer to a variable to receive the information
Example
The following example prints the current value of variable 3: 
XPRSalltype alltype;
XPRSslpgetcolinfo(prob, XPRS_SLPCOLINFO_VALUE, 3, &alltype);
printf("value[3]=%f\n", alltype.value.real);
Further information
1. The following constants are provided for column information handling:
XPRS_SLPCOLINFO_VALUE
Get the current value of the column
XPRS_SLPCOLINFO_RDJ
Get the current reduced cost of the column
XPRS_SLPCOLINFO_DELTAINDEX
Get the delta variable index associated to the column
XPRS_SLPCOLINFO_DELTA
Get the delta value (change since previous value) of the column
XPRS_SLPCOLINFO_DELTADJ
Get the delta variables reduced cost
XPRS_SLPCOLINFO_UPDATEROW
Get the index of the update (or step bound) row associated to the column
XPRS_SLPCOLINFO_SB
Get the step bound on the variable
XPRS_SLPCOLINFO_SBDUAL
Get the dual multiplier of the step bound row for the variable
XPRS_SLPCOLINFO_DETROW
The determining row for the variable (or -1 if it is not determined)
XPRS_SLPCOLINFO_CONVERGENCESTATUS
The convergence status of the variable (0 if unconverged, 1-based index of the convergence tolerance that applied otherwise)
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.
3. The convergence status will be an item from the following list:

convergencestatus Tolerance
0 unconverged
1 Closure tolerance (TC)
2 Absolute delta tolerance (TA)
3 Relative delta tolerance (RA)
4 Absolute coefficient tolerance (TM)
5 Relative coefficient tolerance (RM)
6 Absolute impact tolerance (TI)
7 Relative impact tolerance (RI)
8 Absolute slack tolerance (TS)
9 Relative slack tolerance (RS)
11 Variable temporarily fixed because its determining column is below SLPDRCOLTOL
other user convergence



Parent Topic Library functions and the programming interface

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