coin-discuss:
Hello, I have some problem about Mps config files. Problem is :
When I tested Clp Samples driver.cpp using "mps\samples\exmip1.mps", I got the result:
Model EXAMPLE has 5 rows and 8 columns
Primal Dual Lower Upper T
0 COL01 2.50000 3.94737 2.50000 1.79769e+308 10
1 COL02 0.00000 0.00000 0.00000 4.10000 00
2 COL03 0.00000 0.00000 0.00000 1.00000 00
3 COL04 0.642857 0.00000 0.00000 1.00000 00
4 COL05 0.500000 2.52632 0.500000 4.00000 20
5 COL06 4.00000 0.00000 0.00000 1.79769e+308 00
6 COL07 0.00000 0.00000 0.00000 1.79769e+308 00
7 COL08 0.263158 1.46367e-17 0.00000 4.30000 -10
--------------------------------------
My question is: why COL03 and COL04 are not 0,1 result, because they have been claimed in mps files.
I list the exmip1.mps as follow:
************************************************************************
*
* The data in this file represents the following problem:
*
* Minimize or maximize Z = x1 + 2x5 - x8
*
* Subject to:
*
* 2.5 <= 3x1 + x2 - 2x4 - x5 - x8
* 2x2 + 1.1x3 <= 2.1
* x3 + x6 = 4.0
* 1.8 <= 2.8x4 -1.2x7 <= 5.0
* 3.0 <= 5.6x1 + x5 + 1.9x8 <= 15.0
*
* where:
*
* 2.5 <= x1
* 0 <= x2 <= 4.1
* 0 <= x3
* 0 <= x4
* 0.5 <= x5 <= 4.0
* 0 <= x6
* 0 <= x7
* 0 <= x8 <= 4.3
*
* x3, x4 are 0,1 variables.
*
************************************************************************
NAME EXAMPLE
ROWS
N OBJ
G ROW01
L ROW02
E ROW03
G ROW04
L ROW05
COLUMNS
COL01 OBJ 1.0
COL01 ROW01 3.0 ROW05 5.6
COL02 ROW01 1.0 ROW02 2.0
*
* Mark COL03 and COL04 as integer variables.
*
INT1 'MARKER' 'INTORG'
COL03 ROW02 1.1 ROW03 1.0
COL04 ROW01 -2.0 ROW04 2.8
INT1END 'MARKER' 'INTEND'
*
COL05 OBJ 2.0
COL05 ROW01 -1.0 ROW05 1.0
COL06 ROW03 1.0
COL07 ROW04 -1.2
COL08 OBJ -1.0
COL08 ROW01 -1.0 ROW05 1.9
RHS
RHS1 ROW01 2.5
RHS1 ROW02 2.1
RHS1 ROW03 4.0
RHS1 ROW04 1.8
RHS1 ROW05 15.0
RANGES
RNG1 ROW04 3.2
RNG1 ROW05 12.0
BOUNDS
LO BND1 COL01 2.5
UP BND1 COL02 4.1
LO BND1 COL05 0.5
UP BND1 COL05 4.0
UP BND1 COL08 4.3
ENDATA
Can you explain it?
And more, Do you have any document about mps file format ? Would you like share them to me ?
Thank you.
Casper Wang
China
Email: wangzt at bigsun.com.cn
Dec 10,2003