| The LP Procedure |
Functional Summary
The statements and options available with PROC LP are summarized by purpose in the following table. An alphabetical list of options is provided in the Dictionary of Options.
Table 3.1: Functional Summary| Description | Statement | Option |
| Interactive Statements: | ||
| perform one integer pivot and pause | IPIVOT | |
| perform one simplex pivot and pause | PIVOT | |
| display information at current iteration | ||
| terminate processing immediately | QUIT | |
| reset options specified | RESET | |
| start or resume optimization | RUN | |
| show settings of options | SHOW | |
| Variable Lists: | ||
| variables containing coefficients (sparse) | COEF | |
| variable containing column names (sparse) | COL | |
| alias for the ROW statement | ID | |
| variable (column) containing the range constant for the dense (sparse) format | RANGE | |
| variables (columns) containing RHS constants for the dense (sparse) format | RHS | |
| variables (columns) defining RHS change vectors for the dense (sparse) format | RHSSEN | |
| variable containing names of constraints and objective functions (names of rows) for the dense (sparse) format | ROW | |
| variable containing the type of each observation | TYPE | |
| structural variables (dense) | VAR | |
| Data Set Options: | ||
| active nodes input data set | PROC LP | ACTIVEIN= |
| active nodes output data set | PROC LP | ACTIVEOUT= |
| input data set | PROC LP | DATA= |
| dual output data set | PROC LP | DUALOUT= |
| primal input data set | PROC LP | PRIMALIN= |
| primal output data set | PROC LP | PRIMALOUT= |
| sparse format data input flag | PROC LP | SPARSEDATA |
| tableau output data set | PROC LP | TABLEAUOUT= |
| convert sparse or dense format input data set into MPS-format output data set | PROC LP | MPSOUT= |
| Display Control Options: | ||
| display iteration log | PROC LP | FLOW |
| nonzero tolerance displaying | PROC LP | FUZZ= |
| inverse of FLOW option | PROC LP | NOFLOW |
| inverse of PARAPRINT option | PROC LP | NOPARAPRINT |
| omit some displaying | PROC LP | NOPRINT |
| inverse of TABLEAUPRINT | PROC LP | NOTABLEAUPRINT |
| parametric programming displaying | PROC LP | PARAPRINT |
| inverse of NOPRINT | PROC LP | |
| iteration frequency of display | PROC LP | PRINTFREQ= |
| level of display desired | PROC LP | PRINTLEVEL= |
| display the final tableau | PROC LP | TABLEAUPRINT |
| Interactive Control Options: | ||
| pause before displaying the solution | PROC LP | ENDPAUSE |
| pause after first feasible solution | PROC LP | FEASIBLEPAUSE |
| pause frequency of integer solutions | PROC LP | IFEASIBLEPAUSE= |
| pause frequency of integer iterations | PROC LP | IPAUSE= |
| inverse of ENDPAUSE | PROC LP | NOENDPAUSE |
| inverse of FEASIBLEPAUSE | PROC LP | NOFEASIBLEPAUSE |
| pause frequency of iterations | PROC LP | PAUSE= |
| pause if within specified proximity | PROC LP | PROXIMITYPAUSE= |
| pause after data is read | PROC LP | READPAUSE |
| Preprocessing Options: | ||
| do not perform preprocessing | PROC LP | NOPREPROCESS |
| preprocessing error tolerance | PROC LP | PEPSILON= |
| limit preprocessing iterations | PROC LP | PMAXIT= |
| perform preprocessing techniques | PROC LP | PREPROCESS |
| Branch-and-Bound (BB) Control Options: | ||
| perform automatic node selection technique | PROC LP | AUTO |
| backtrack strategy to be used | PROC LP | BACKTRACK= |
| branch on binary variables first | PROC LP | BINFST |
| active node selection strategy | PROC LP | CANSELECT= |
| comprehensive node selection control parameter | PROC LP | CONTROL= |
| backtrack related technique | PROC LP | DELTAIT= |
| measure for pruning BB tree | PROC LP | DOBJECTIVE= |
| integer tolerance | PROC LP | IEPSILON= |
| limit integer iterations | PROC LP | IMAXIT= |
| measure for pruning BB tree | PROC LP | IOBJECTIVE= |
| order of two branched nodes in adding to BB tree | PROC LP | LIFOTYPE= |
| inverse of AUTO | PROC LP | NOAUTO |
| inverse of BINFST | PROC LP | NOBINFST |
| inverse of POSTPROCESS | PROC LP | NOPOSTPROCESS |
| limit number of branching variables | PROC LP | PENALTYDEPTH= |
| measure for pruning BB tree | PROC LP | POBJECTIVE= |
| perform variables fixing technique | PROC LP | POSTPROCESS |
| percentage used in updating WOBJECTIVE | PROC LP | PWOBJECTIVE= |
| compression algorithm for storing active nodes | PROC LP | TREETYPE= |
| branching variable selection strategy | PROC LP | VARSELECT= |
| delay examination of some active nodes | PROC LP | WOBJECTIVE= |
| Sensitivity/Parametric/Ranging Control Options: | ||
| inverse of RANGEPRICE | PROC LP | NORANGEPRICE |
| inverse of RANGERHS | PROC LP | NORANGERHS |
| limit perturbation of the price vector | PROC LP | PRICEPHI= |
| range analysis on the price coefficients | PROC LP | RANGEPRICE |
| range analysis on the RHS vector | PROC LP | RANGERHS |
| limit perturbation of the RHS vector | PROC LP | RHSPHI= |
| Simplex Algorithm Control Options: | ||
| use devex method | PROC LP | DEVEX |
| general error tolerance | PROC LP | EPSILON= |
| perform goal programming | PROC LP | GOALPROGRAM |
| largest number used in computation | PROC LP | INFINITY= |
| reinversion frequency | PROC LP | INVFREQ= |
| reinversion tolerance | PROC LP | INVTOL= |
| simultaneously set MAXIT1, MAXIT2, MAXIT3 and IMAXIT values | PROC LP | MAXIT= |
| limit phase 1 iterations | PROC LP | MAXIT1= |
| limit phase 2 iterations | PROC LP | MAXIT2= |
| limit phase 3 iterations | PROC LP | MAXIT3= |
| inverse of devex | PROC LP | NODEVEX |
| restore basis after parametric programming | PROC LP | PARARESTORE |
| weight of the phase 2 objective function in phase 1 | PROC LP | PHASEMIX= |
| multiple pricing strategy | PROC LP | PRICETYPE= |
| number of columns to subset in multiple pricing | PROC LP | PRICE= |
| limit the number of iterations randomly selecting each entering variable during phase 1 | PROC LP | RANDOMPRICEMULT= |
| zero tolerance in ratio test | PROC LP | REPSILON= |
| scaling type to be performed | PROC LP | SCALE= |
| zero tolerance in LU decomposition | PROC LP | SMALL= |
| time pause limit | PROC LP | TIME= |
| control pivoting during LU decomposition | PROC LP | U= |
| RESET Statement Options: | ||
| The RESET statement supports the same options as the PROC LP statement except for | ||
| the DATA=, PRIMALIN=, and ACTIVEIN= options, and supports the following additional | ||
| options: | ||
| new variable lower bound during phase 3 | RESET | LOWER= |
| new variable upper bound during phase 3 | RESET | UPPER= |
| PRINT Statement Options: | ||
| display the best integer solution | BEST | |
| display variable summary for specified columns | COLUMN | |
| display variable summary and price sensitivity analysis for specified columns | COLUMN / SENSITIVITY | |
| display variable summary for integer variables | INTEGER | |
| display variable summary for nonzero integer variables | INTEGER_NONZEROS | |
| display variable summary for integer variables with zero activity | INTEGER_ZEROS | |
| display submatrix for specified rows and columns | MATRIX | |
| display formatted submatrix for specified rows and columns | MATRIX / PICTURE | |
| display variable summary for continuous variables | NONINTEGER | |
| display variable summary for nonzero continuous variables | NONINTEGER_NONZEROS | |
| display variable summary for variables with nonzero activity | NONZEROS | |
| display price sensitivity analysis or price parametric programming | PRICESEN | |
| display price range analysis | RANGEPRICE | |
| display RHS range analysis | RANGERHS | |
| display RHS sensitivity analysis or RHS parametric programming | RHSSEN | |
| display constraint summary for specified rows | ROW | |
| display constraint summary and RHS sensitivity analysis for specified rows | ROW / SENSITIVITY | |
| display solution, variable, and constraint summaries | SOLUTION | |
| display current tableau | TABLEAU | |
| display variables with zero activity | ZEROS | |
| SHOW Statement Options: | ||
| display options applied | SHOW | OPTIONS |
| display status of the current solution | SHOW | STATUS |
| QUIT Statement Option: | ||
| save the defined output data sets and then terminate PROC LP | QUIT | / SAVE |
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