SHOW Statement :: SAS/OR(R) 12.3 User's Guide: Mathematical Programming Legacy Procedures

SHOW Statement

SHOW options / qualifiers ;

The options available with the SHOW statement of PROC NETFLOW are summarized by purpose in the following table.

Table 6.5: Functional Summary, SHOW Statement

Description	Statement	Option
SHOW Statement Options:
Show problem, optimization status	SHOW	STATUS
Show network model parameters	SHOW	NETSTMT
Show data sets that have been or will be created	SHOW	DATASETS
Show options that pause optimization	SHOW	PAUSE
Show simplex algorithm options	SHOW	SIMPLEX
Show pricing strategy options	SHOW	PRICING
Show miscellaneous options	SHOW	MISC
SHOW Statement Qualifiers:
Display information only on relevant options	SHOW	/ RELEVANT
Display options for current stage only	SHOW	/ STAGE

The SHOW statement enables you to examine the status of the problem and values of the RESET statement options. All output of the SHOW statement appears on the SAS log. The amount of information displayed when a SHOW statement is processed can be limited if some of the options of the SHOW statement are specified. These options indicate whether the problem status or a specific category of the RESET options is of interest. If no options are specified, the problem status and information on all RESET statement options in every category is displayed. The amount of displayed information can be limited further by following any SHOW statement options with a slash (/) and one or both qualifiers, RELEVANT and STAGE.

STATUS

produces one of the following optimization status reports, whichever is applicable. The warning messages are issued only if the network or entire problem is infeasible.

  NOTE: Optimization Status.
        Optimization has not started yet.

  NOTE: Optimization Status.
        Optimizing network (ignoring any side constraints).
        Number of iterations=17
        Of these, 3 were degenerate
  WARNING: This optimization has detected that the network is
           infeasible.

  NOTE: Optimization Status.
        Found network optimum (ignoring side constraints)
        Number of iterations=23
        Of these, 8 were degenerate

  NOTE: Optimization Status.
        Optimizing side constrained network.
        Number of iterations=27
        Of these, 9 were degenerate
  WARNING: This optimization has detected that the problem is
           infeasible.

  NOTE: Optimization Status.
        Found side constrained network optimum
        Number of iterations=6
        Of these, 0 were degenerate

DATASETS

produces a report on output data sets.

  NOTE: Current output SAS data sets
        No output data sets have been specified

  NOTE: Current output SAS data sets
        ARCOUT=libname.memname
        NODEOUT=libname.memname
        CONOUT=libname.memname
        DUALOUT=libname.memname

  NOTE: Other SAS data sets specified in previous ARCOUT=, NODEOUT=,
        CONOUT=, or DUALOUT=.
        libname.memname
                .
                .
                .

  NOTE: Current output SAS data sets (SHOW DATASETS)
        libname.memname
                .
                .
                .
  NOTE: SAS data sets specified as ARCOUT= NODEOUT= CONOUT= or 
        DUALOUT= data sets in previous PROC NETFLOW, SET, RESET 
        and SAVE statements.
        The number following the data set specification was the 
        iteration number when observations were placed into the 
        data set.
        libname.memname      iteration_number
                .                   .
                .                   .
                .                   .

PAUSE

produces a report on the current settings of options used to make optimization pause.

  NOTE: Options and parameters that stop optimization for reasons 
        other than infeasibility or optimality (SHOW PAUSE)
        FEASIBLEPAUSE1=FALSE
        ENDPAUSE1=FALSE
        PAUSE1=999999
        MAXIT1=1000
        FEASIBLEPAUSE2=FALSE
        PAUSE2=999999
        MAXIT2=999999

SIMPLEX

produces the following:

  NOTE: Options and parameters that control the primal simplex 
        network algorithm (excluding those that affect the 
        pricing strategies) (SHOW SIMPLEX)
        LRATIO1=FALSE
        BIGM1=NOTWOPHASE1=TRUE, TWOPHASE1=NOBIGM1=FALSE
        CYCLEMULT1=0.15
        PERTURB1=FALSE
        MINBLOCK1=2
        INTFIRST=TRUE
        LRATIO2=FALSE
        BIGM2=NOTWOPHASE2=TRUE, TWOPHASE2=NOBIGM2=FALSE
        REFACTFREQ=50
        U=0.1
        MAXLUUPDATES=6
        MAXL=40

PRICING

produces the following:

  NOTE: Options and parameters that control the primal simplex 
        network algorithm pricing strategies (SHOW PRICING)
        PRICETYPE1=Q
        P1SCAN=FIRST
        P1NPARTIAL=10
        Q1FILLSCAN=FIRST
        QSIZE1=24
        REFRESHQ1=0.75
        REDUCEQSIZE1=1
        Q1FILLNPARTIAL=10
        PRICETYPE2=Q
        P2SCAN=FIRST
        P2NPARTIAL=10
        DUALFREQ=4
        Q2FILLSCAN=FIRST
        QSIZE2=24
        REFRESHQ2=0.75
        REDUCEQSIZE2=1
        Q2FILLNPARTIAL=10

MISC

produces the following:

  NOTE: Miscellaneous options and parameters (SHOW MISC)
        VERBOSE=12
        ZTOL1=TRUE
        ZERO1=1E-6
        FUTURE1=FALSE
        ZTOL2=TRUE
        ZERO2=1E-6
        FUTURE2=FALSE

Following a slash (/), the qualifiers below can appear in any SHOW statement.

RELEVANT

indicates that you want information only on relevant options of the RESET statement. The following will not be displayed if / RELEVANT is specified:

information on noncurrent data sets
the options that control the reasons why stage 1 optimization should be halted and the options that control the simplex algorithm during stage 1 optimization, if the unconstrained optimum has been reached or constrained optimization has been performed
if P1SCAN=BEST or P1SCAN=FIRST, the P1NPARTIAL= option is irrelevant
if PRICETYPE1=BLAND or PRICETYPE1=NOQ, the options QSIZE1=, Q1FILLSCAN=, REFRESHQ1=, and REDUCEQSIZE1= are irrelevant
if Q1FILLSCAN=BEST or Q1FILLSCAN=FIRST, the Q1FILLNPARTIAL= option is irrelevant
the options that control the reasons stage 2 optimization should be halted, the options that control the simplex algorithm during stage 2 optimization, if the constrained optimum has been reached
if P2SCAN=BEST or P2SCAN=FIRST, the P2NPARTIAL= option is irrelevant
if PRICETYPE2=BLAND or PRICETYPE2=NOQ, the options QSIZE2=, Q2FILLSCAN=, REFRESHQ2=, and REDUCEQSIZE2= are irrelevant
if Q2FILLSCAN=BEST or Q2FILLSCAN=FIRST, the Q2FILLNPARTIAL= option is irrelevant

STAGE

indicates that you want to examine only the options that affect the optimization that is performed if a RUN statement is executed next. Before any optimization has been done, only stage 2 options are displayed if the problem has side constraints and the SCRATCH option is used, or if the CONOPT statement is specified. Otherwise, stage 1 options are displayed. If still optimizing neglecting constraints, only stage 1 options will be displayed. If the unconstrained optimum has been reached and optimization that considers constraints has not been performed, stage 1 options are displayed. If the problem has constraints, stage 2 options are displayed. If any optimization that considers constraints has been performed, only stage 2 options are displayed.