The INTPOINT Procedure
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Overview
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Getting Started
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SyntaxFunctional SummaryDictionary of OptionsPROC INTPOINT StatementCAPACITY StatementCOEF StatementCOLUMN StatementCOST StatementDEMAND StatementHEADNODE StatementID StatementLO StatementNAME StatementNODE StatementQUIT StatementRHS StatementROW StatementRUN StatementSUPDEM StatementSUPPLY StatementTAILNODE StatementTYPE StatementVAR Statement
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DetailsInput Data SetsOutput Data SetsConverting Any PROC INTPOINT Format to an MPS-Format SAS Data SetCase SensitivityLoop ArcsMultiple ArcsFlow and Value BoundsTightening Bounds and Side ConstraintsReasons for InfeasibilityMissing S Supply and Missing D Demand ValuesBalancing Total Supply and Total DemandHow to Make the Data Read of PROC INTPOINT More EfficientStopping Criteria
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ExamplesProduction, Inventory, Distribution ProblemAltering Arc DataAdding Side ConstraintsUsing Constraints and More Alteration to Arc DataNonarc Variables in the Side ConstraintsSolving an LP Problem with Data in MPS FormatConverting to an MPS-Format SAS Data SetMigration to OPTMODEL: Production, Inventory, Distribution
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SUPDEM variable ;
The SAS variable in this list, which must be present in the NODEDATA= data set, contains supply and demand information for the nodes in the NODE list. A positive SUPDEM list variable value 
denotes that the node named in the NODE list variable can supply 
units of flow. A negative SUPDEM list variable value 
means that this node demands 
units of flow. If a SAS variable is not explicitly specified, a SAS variable with the name _SUPDEM_ or _SD_ in the NODEDATA= data set is used as the SUPDEM variable. If a node is a transshipment node (neither a supply nor a demand node), an observation
associated with this node need not be present in the NODEDATA= data set. If present, the SUPDEM list variable value must be zero or a missing value. See the section Missing S Supply and Missing D Demand Values for cases when the SUPDEM list variable values can have other values.