int GRBgetdblattrarray ( GRBmodel *model,
const char *attrname,
int start,
int len,
double *values )

Query the values of a double-valued array attribute.

Return value:

A non-zero return value indicates that a problem occurred while querying the attribute. Refer to the Error Code table for a list of possible return values. Details on the error can be obtained by calling GRBgeterrormsg.


model: A loaded optimization model, typically created by routine GRBnewmodel or GRBreadmodel.

attrname: The name of a double-valued array attribute. Available attributes are listed and described in the Attributes section of this document.

start: The index of the first entry in the array to retrieve.

len: The number of array entries to retrieve.

values: A pointer to the location where the array attribute should be returned. Note that the result array must be as long as the requested sub-array.

Example usage:

  double lb[NUMVARS];
  error = GRBgetdblattrarray(model, "LB", 0, cols, lb);