The LP Procedure
- Overview
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Getting Started
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Syntax
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DetailsMissing ValuesDense Data Input FormatSparse Data Input FormatConverting Any PROC LP Format to an MPS-Format SAS Data SetConverting Standard MPS Format to Sparse FormatThe Reduced Costs, Dual Activities, and Current TableauMacro Variable _ORLP_PricingScalingPreprocessingInteger ProgrammingSensitivity AnalysisRange AnalysisParametric ProgrammingInteractive FacilitiesMemory ManagementOutput Data SetsInput Data SetsDisplayed OutputODS Table and Variable NamesMemory Limit
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ExamplesAn Oil Blending ProblemA Sparse View of the Oil Blending ProblemSensitivity Analysis: Changes in Objective CoefficientsAdditional Sensitivity AnalysisPrice Parametric Programming for the Oil Blending ProblemSpecial Ordered Sets and the Oil Blending ProblemGoal-Programming a Product Mix ProblemA Simple Integer ProgramAn Infeasible ProblemRestarting an Integer ProgramAlternative Search of the Branch-and-Bound TreeAn Assignment ProblemA Scheduling ProblemA Multicommodity Transshipment Problem with Fixed ChargesConverting to an MPS-Format SAS Data SetMigration to OPTMODEL: AssignmentMigration to OPTMODEL: Multicommodity Transshipment
- References
ID Statement
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ID variable(s);
For the dense input format, the ID statement specifies a character variable in the problem data set that contains a name for
each constraint coefficients row, objective coefficients row, and variable definition row. If the ID statement is omitted,
the LP procedure looks for the default variable name, _ID_. If this variable is not in the problem data set, the procedure assigns the default name _OBS
_ to each row, where specifies the observation number in the problem data set.
For the sparse input format, the ID statement specifies the character variables in the problem data set that contain the names
of the rows in the model. Rows in the model are one of the following types: constraints, objective functions, bounding rows,
or variable describing rows. The ID variables must be character variables. There must be the same number of ID variables as
variables specified in the COEF
statement. If the ID statement is omitted, the LP procedure looks for the default variable names having the prefix _ID.
Note: The ID statement is an alias for the ROW statement.