Output Data Set

The INTPOINT Procedure

Output Data Set

For NPSC problems, the procedure determines the flow that should pass through each arc as well as the value that should be assigned to each nonarc variable. The goal is that the minimum flow bounds, capacities, lower and upper value bounds, and side constraints are not violated. This goal is reached when total cost incurred by such a flow pattern and value assignment is feasible and optimal. The solution found must also conserve flow at each node.

For LP problems, the procedure determines the value that should be assigned to each variable. The goal is that the lower and upper value bounds and the constraints are not violated. This goal is reached when the total cost incurred by such a value assignment is feasible and optimal.

The CONOUT= data set can be produced and contains a solution obtained after performing optimization.

CONOUT= Data Set

The CONOUT= data set contains the following variables, and their possible values in an observation are

_FROM_: a tail node of an arc. This is a missing value if an observation has information about a nonarc variable.
_TO_: a head node of an arc. This is a missing value if an observation has information about a nonarc variable.
_COST_: the cost of an arc or the objective function coefficient of a nonarc variable.
_CAPAC_: the capacity of an arc or upper value bound of a nonarc variable
_LO_: the lower flow bound of an arc or lower value bound of a nonarc variable
_NAME_: a name of an arc or nonarc variable
_SUPPLY_: the supply of the tail node of the arc in the observation. This is a missing value if an observation has information about a nonarc variable.
_DEMAND_: the demand of the head node of the arc in the observation. This is a missing value if an observation has information about a nonarc variable.
_FLOW_: the flow through the arc or value of the nonarc variable
_FCOST_: flow cost, the product of _COST_ and _FLOW_
_RCOST_: the reduced cost of the arc or nonarc variable
_STATUS_: the status of the arc or nonarc variable

The variables present in the ARCDATA= data set are present in a CONOUT= data set. For example, if there is a variable called tail in the ARCDATA= data set and you specified the SAS variable list:

   from tail;

then tail is a variable in the CONOUT= data sets instead of _FROM_. Any ID list variables also appear in the CONOUT= data sets.

Chapter Contents
Previous
Next
Top