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Solve LP, displaying the initial and optimal tableau

Description

Inputs an MPS matrix file and required optimization sense, and proceeds to solve the problem with lpoptimize. The simplex algorithm is interrupted to get its intial basis, and a tableau is requested with a call to function showtab. Once the solution is found, a second call produces the optimal tableau.

Function showtab retrieves the pivot order of the basic variables, along with other problem information, and then constructs (and displays) the tableau row-by-row using the backwards transformation, btran.

Note that tableau should only be used with matrices whose MPS names are no longer than 8 characters.


tableau.zip[download all files]

Source Files
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tableau.c[download]

Data Files
tablo.mps[download]
tablobig.mps[download]




tablo.mps

NAME          tablo   
ROWS
 N  min     
 G  c1      
 G  c2      
 G  e       
COLUMNS
    x         min           1.000000   c1            2.000000
    x         c2            1.000000   e             1.000000
    y         min           1.000000   c1            1.000000
    y         c2            2.000000   e             1.000000
RHS
    RHS00001  c1            3.000000   c2            3.000000
    RHS00001  e             1.000000
ENDATA
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