FICO Xpress Optimization Examples Repository: Definition of a network

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Definition of a network

Description

definition of a data structure to represent arcs in a network with source, sink, and other properties
accessing the different record fields
initialization of records with data from a text file
selection of record fields in initializations (arcs2.mos)
separate initialization of record fields (arcs3.mos)
sets and lists of records, using type constructors (arcs4.mos)
constant record definition, sets of constant records (arcs5.mos)

Further explanation of this example: 'Mosel User Guide', Section 8.6 Records

arcs.zip

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Source Files

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arcs.mos	[download]
arcs2.mos	[download]
arcs3.mos	[download]
arcs4.mos	[download]
arcs5.mos	[download]

Data Files

arcs.dat

[download]

arcs.mos

(!******************************************************
   Mosel User Guide Example Problems
   ================================= 

   file arcs.mos
   `````````````
   Working with records: definition of a network.
   
   (c) 2008 Fair Isaac Corporation
       author: S. Heipcke, Nov. 2006
*******************************************************!)

model "Arcs"

 declarations
  NODES: set of string                  ! Set of nodes
  ARC: array(ARCSET:range) of record    ! Arcs:
   Source,Sink: string                  !   Source and sink of arc
   Cost: real                           !   Cost coefficient
  end-record 
 end-declarations

 initializations from 'arcs.dat'
  ARC
 end-initializations

! Calculate the set of nodes
 NODES:=union(a in ARCSET) {ARC(a).Source, ARC(a).Sink}
 writeln(NODES)

 writeln("Average arc cost: ", sum(a in ARCSET) ARC(a).Cost / getsize(ARCSET) )

end-model