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XPRSgetindicators

Purpose
Returns the indicator constraint condition (indicator variable and complement flag) associated to the rows in a given range.
Topic area
Problem Information
Synopsis
int XPRS_CC XPRSgetindicators(XPRSprob prob, int colind[], int complement[], int first, int last);
Arguments
prob 
The current problem.
colind 
Integer array of length last-first+1 where the column indices of the indicator variables are to be placed. May be NULL.
complement 
Integer array of length last-first+1 where the indicator complement flags will be returned:
0 
not an indicator constraint (in this case the corresponding entry in the colind array is ignored);
1 
for indicator constraints with condition " bin = 1";
-1 
for indicator constraints with condition " bin = 0".
May be NULL.
first 
First row in the range.
last 
Last row in the range (inclusive).
Example
The following example retrieves information about all indicator constraints in the matrix and prints a list of their indices. 
int i, rows;
double *colind, *complement;
...
XPRSgetintattrib(prob,XPRS_ROWS,&rows);
colind = malloc(rows*(sizeof(int)));
complement = malloc(rows*(sizeof(int)));
XPRSgetindicators(prob,colind,complement,0,rows-1);

printf("Indicator rows:");
for(i=0; i<rows; i++) if(complement[i]!=0) printf(" %d", i);
printf("\n");
Further information
This function cannot be called while the current problem is being solved or when it is in an interrupted state. Use XPRSpostsolve to restore the problem to a non-solving state.
Related topics
XPRSsetindicators, XPRSdelindicators.

Parent Topic Console and Library Functions

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