The NETFLOW Procedure

Functional Summary

The following table outlines the options available for the NETFLOW procedure classified by function. An alphabetical list of options is provided in the Dictionary of Options .

Table 5.1: Functional Summary

Description	Statement	Option
Input Data Set Options:
Arcs input data set	PROC NETFLOW	ARCDATA=
Nodes input data set	PROC NETFLOW	NODEDATA=
Constraint input data set	PROC NETFLOW	CONDATA=
Output Data Set Options:
Unconstrained primal solution data set	PROC NETFLOW	ARCOUT=
Unconstrained dual solution data set	PROC NETFLOW	NODEOUT=
Constrained primal solution data set	PROC NETFLOW	CONOUT=
Constrained dual solution data set	PROC NETFLOW	DUALOUT=
Convert sparse or dense format input data set into MPS format output data set	PROC NETFLOW	MPSOUT=
Data Set Read Options:
CONDATA has sparse data format	PROC NETFLOW	SPARSECONDATA
Default constraint type	PROC NETFLOW	DEFCONTYPE=
Special COLUMN variable value	PROC NETFLOW	TYPEOBS=
Special COLUMN variable value	PROC NETFLOW	RHSOBS=
Used to interpret arc and nonarc variable names	PROC NETFLOW	NAMECTRL=
No new nonarc variables	PROC NETFLOW	SAME_NONARC_DATA
No nonarc data in ARCDATA	PROC NETFLOW	ARCS_ONLY_ARCDATA
Data for an arc found once in ARCDATA	PROC NETFLOW	ARC_SINGLE_OBS
Data for a constraint found once in CONDATA	PROC NETFLOW	CON_SINGLE_OBS
Data for a coefficient found once in CONDATA	PROC NETFLOW	NON_REPLIC=
Data are grouped, exploited during data read	PROC NETFLOW	GROUPED=
Problem Size Specification Options:
Approximate number of nodes	PROC NETFLOW	NNODES=
Approximate number of arcs	PROC NETFLOW	NARCS=
Approximate number of nonarc variables	PROC NETFLOW	NNAS=
Approximate number of coefficients	PROC NETFLOW	NCOEFS=
Approximate number of constraints	PROC NETFLOW	NCONS=
Network Options:
Default arc cost	PROC NETFLOW	DEFCOST=
Default arc capacity	PROC NETFLOW	DEFCAPACITY=
Default arc lower flow bound	PROC NETFLOW	DEFMINFLOW=
Network’s only supply node	PROC NETFLOW	SOURCE=
SOURCE ’s supply capability	PROC NETFLOW	SUPPLY=
Network’s only demand node	PROC NETFLOW	SINK=
SINK ’s demand	PROC NETFLOW	DEMAND=
Convey excess supply/demand through network	PROC NETFLOW	THRUNET
Find maximal flow between SOURCE and SINK	PROC NETFLOW	MAXFLOW
Cost of bypass arc for MAXFLOW problem	PROC NETFLOW	BYPASSDIVIDE=
Find shortest path from SOURCE to SINK	PROC NETFLOW	SHORTPATH
Specify generalized networks	PROC NETFLOW	GENNET
Specify excess demand or supply	PROC NETFLOW	EXCESS=
Memory Control Options:
Issue memory usage messages to SAS log	PROC NETFLOW	MEMREP
Number of bytes to use for main memory	PROC NETFLOW	BYTES=
Proportion of memory for arrays	PROC NETFLOW	COREFACTOR=
Memory allocated for LU factors	PROC NETFLOW	DWIA=
Linked list for updated column	PROC NETFLOW	SPARSEP2
Use 2-dimensional array for basis matrix	PROC NETFLOW	INVD_2D
Maximum bytes for a single array	PROC NETFLOW	MAXARRAYBYTES=
Simplex Options:
Use big-M instead of two-phase method, stage 1	RESET	BIGM1
Use Big-M instead of two-phase method, stage 2	RESET	BIGM2
Anti-cycling option	RESET	CYCLEMULT1=
Interchange first nonkey with leaving key arc	RESET	INTFIRST
Controls working basis matrix inversions	RESET	INVFREQ=
Maximum number of L row operations allowed before refactorization	RESET	MAXL=
Maximum number of LU factor column updates	RESET	MAXLUUPDATES=
Anti-cycling option	RESET	MINBLOCK1=
Use first eligible leaving variable, stage 1	RESET	LRATIO1
Use first eligible leaving variable, stage 2	RESET	LRATIO2
Negates INTFIRST	RESET	NOINTFIRST
Negates LRATIO1	RESET	NOLRATIO1
Negates LRATIO2	RESET	NOLRATIO2
Negates PERTURB1	RESET	NOPERTURB1
Anti-cycling option	RESET	PERTURB1
Controls working basis matrix refactorization	RESET	REFACTFREQ=
Use two-phase instead of big-M method, stage 1	RESET	TWOPHASE1
Use two-phase instead of big-M method, stage 2	RESET	TWOPHASE2
Pivot element selection parameter	RESET	U=
Zero tolerance, stage 1	RESET	ZERO1=
Zero tolerance, stage 2	RESET	ZERO2=
Zero tolerance, real number comparisons	RESET	ZEROTOL=
Pricing Options:
Frequency of dual value calculation	RESET	DUALFREQ=
Pricing strategy, stage 1	RESET	PRICETYPE1=
Pricing strategy, stage 2	RESET	PRICETYPE2=
Used when P1SCAN= PARTIAL	RESET	P1NPARTIAL=
Controls search for entering candidate, stage 1	RESET	P1SCAN=
Used when P2SCAN= PARTIAL	RESET	P2NPARTIAL=
Controls search for entering candidate, stage 2	RESET	P2SCAN=
Initial queue size, stage 1	RESET	QSIZE1=
Initial queue size, stage 2	RESET	QSIZE2=
Used when Q1FILLSCAN= PARTIAL	RESET	Q1FILLNPARTIAL=
Controls scan when filling queue, stage 1	RESET	Q1FILLSCAN=
Used when Q2FILLSCAN= PARTIAL	RESET	Q2FILLNPARTIAL=
Controls scan when filling queue, stage 2	RESET	Q2FILLSCAN=
Queue size reduction factor, stage 1	RESET	REDUCEQSIZE1=
Queue size reduction factor, stage 2	RESET	REDUCEQSIZE2=
Frequency of refreshing queue, stage 1	RESET	REFRESHQ1=
Frequency of refreshing queue, stage 2	RESET	REFRESHQ2=
Optimization Termination Options:
Pause after stage 1; do not start stage 2	RESET	ENDPAUSE1
Pause when feasible, stage 1	RESET	FEASIBLEPAUSE1
Pause when feasible, stage 2	RESET	FEASIBLEPAUSE2
Maximum number of iterations, stage 1	RESET	MAXIT1=
Maximum number of iterations, stage 2	RESET	MAXIT2=
Negates ENDPAUSE1	RESET	NOENDPAUSE1
Negates FEASIBLEPAUSE1	RESET	NOFEASIBLEPAUSE1
Negates FEASIBLEPAUSE2	RESET	NOFEASIBLEPAUSE2
Pause every PAUSE1 iterations, stage 1	RESET	PAUSE1=
Pause every PAUSE2 iterations, stage 2	RESET	PAUSE2=
Interior Point Algorithm Options:
Use interior point algorithm	PROC NETFLOW	INTPOINT
Factorization method	RESET	FACT_METHOD=
Allowed amount of dual infeasibility	RESET	TOLDINF=
Allowed amount of primal infeasibility	RESET	TOLPINF=
Allowed total amount of dual infeasibility	RESET	TOLTOTDINF=
Allowed total amount of primal infeasibility	RESET	TOLTOTPINF=
Cut-off tolerance for Cholesky factorization	RESET	CHOLTINYTOL=
Density threshold for Cholesky processing	RESET	DENSETHR=
Step-length multiplier	RESET	PDSTEPMULT=
Preprocessing type	RESET	PRSLTYPE=
Print optimization progress on SAS log	RESET	PRINTLEVEL2=
Interior Point Stopping Criteria Options:
Maximum number of interior point iterations	RESET	MAXITERB=
Primal-dual (duality) gap tolerance	RESET	PDGAPTOL=
Stop because of complementarity	RESET	STOP_C=
Stop because of duality gap	RESET	STOP_DG=
Stop because of $\mi{infeas}_ b$	RESET	STOP_IB=
Stop because of $\mi{infeas}_ c$	RESET	STOP_IC=
Stop because of $\mi{infeas}_ d$	RESET	STOP_ID=
Stop because of complementarity	RESET	AND_STOP_C=
Stop because of duality gap	RESET	AND_STOP_DG=
Stop because of $\mi{infeas}_ b$	RESET	AND_STOP_IB=
Stop because of $\mi{infeas}_ c$	RESET	AND_STOP_IC=
Stop because of $\mi{infeas}_ d$	RESET	AND_STOP_ID=
Stop because of complementarity	RESET	KEEPGOING_C=
Stop because of duality gap	RESET	KEEPGOING_DG=
Stop because of $\mi{infeas}_ b$	RESET	KEEPGOING_IB=
Stop because of $\mi{infeas}_ c$	RESET	KEEPGOING_IC=
Stop because of $\mi{infeas}_ d$	RESET	KEEPGOING_ID=
Stop because of complementarity	RESET	AND_KEEPGOING_C=
Stop because of duality gap	RESET	AND_KEEPGOING_DG=
Stop because of $\mi{infeas}_ b$	RESET	AND_KEEPGOING_IB=
Stop because of $\mi{infeas}_ c$	RESET	AND_KEEPGOING_IC=
Stop because of $\mi{infeas}_ d$	RESET	AND_KEEPGOING_ID=
PRINT Statement Options:
Display everything	PRINT	PROBLEM
Display arc information	PRINT	ARCS
Display nonarc variable information	PRINT	NONARCS
Display variable information	PRINT	VARIABLES
Display constraint information	PRINT	CONSTRAINTS
Display information for some arcs	PRINT	SOME_ARCS
Display information for some nonarc variables	PRINT	SOME_NONARCS
Display information for some variables	PRINT	SOME_VARIABLES
Display information for some constraints	PRINT	SOME_CONS
Display information for some constraints associated with some arcs	PRINT	CON_ARCS
Display information for some constraints associated with some nonarc variables	PRINT	CON_NONARCS
Display information for some constraints associated with some variables	PRINT	CON_VARIABLES
PRINT Statement Qualifiers:
Produce a short report	PRINT	/ SHORT
Produce a long report	PRINT	/ LONG
Display arcs/variables with zero flow/value	PRINT	/ ZERO
Display arcs/variables with nonzero flow/value	PRINT	/ NONZERO
Display basic arcs/variables	PRINT	/ BASIC
Display nonbasic arcs/variables	PRINT	/ NONBASIC
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
Miscellaneous Options:
Infinity value	PROC NETFLOW	INFINITY=
Scale constraint row, nonarc variable column coefficients, or both	PROC NETFLOW	SCALE=
Maximization instead of minimization	PROC NETFLOW	MAXIMIZE
Use warm start solution	PROC NETFLOW	WARM
All-artificial starting solution	PROC NETFLOW	ALLART
Output complete basis information to ARCOUT= and NODEOUT= data sets	RESET	FUTURE1
Output complete basis information to CONOUT= and DUALOUT= data sets	RESET	FUTURE2
Turn off infeasibility or optimality flags	RESET	MOREOPT
Negates FUTURE1	RESET	NOFUTURE1
Negates FUTURE2	RESET	NOFUTURE2
Negates SCRATCH	RESET	NOSCRATCH
Negates ZTOL1	RESET	NOZTOL1
Negates ZTOL2	RESET	NOZTOL2
Write optimization time to SAS log	RESET	OPTIM_TIMER
No stage 1 optimization; do stage 2 optimization	RESET	SCRATCH
Suppress similar SAS log messages	RESET	VERBOSE=
Use zero tolerance, stage 1	RESET	ZTOL1
Use zero tolerance, stage 2	RESET	ZTOL2