FICO Xpress Optimization Examples Repository: Delivery: Infeasibility analysis with IIS

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Delivery: Infeasibility analysis with IIS

Description

A simple supply and demand network example demonstrating infeasibility analysis with IIS.

simple LP model
data input from file
retrieving IIS and printing out the names of all variables and constraints contained in the sets

delvriis.zip

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Source Files

By clicking on a file name, a preview is opened at the bottom of this page.

delvriis.mos

[download]

Data Files

cost.dat	[download]
ifvan.dat	[download]

cost.dat

! Delivery Problem
! Data File: cost.dat
!
! Table COST: Unit transportation cost
!
!
! TO  London Livpol Doncst   York   Hull Manchr Shffld   ! FROM
        0.0,   6.3,   7.1,   9.4,   8.2,  10.2,   3.1    ! London
        3.4,   8.8,   6.1,   7.9,   3.2,   6.5,   8.1    ! Luton
       14.2,  13.5,  16.4,   7.4,   8.5,   5.6,   9.0    ! B'ham
       15.6,  22.4,  19.7,  16.5,  17.1,  18.2,   0.0    ! Bristl
       12.4,  18.6,  26.3,  31.2,  15.7,  21.4,  12.9    ! Derby
       37.3,  23.4,  18.6,  16.4,  13.2,  19.1,  31.0    ! Stckpt
       14.5,  19.7,  21.6,  18.3,  23.9,  28.4,  23.7    ! York
       19.6,   5.6,  12.9,  15.2,   0.0,  13.6,  15.4    ! Derby
       18.4,   9.3,  17.1,  22.5,  26.3,  28.5,  31.6    ! Soton
        9.4,  18.2,  15.6,  17.1,  33.9,   5.3,  17.0    ! Scnthp