The NETFLOW Procedure


SHOW Statement

  • SHOW options / qualifiers;

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

Table 5.5: 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:

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.