What is Gurobi's equivalent to SCIP's getBasisStatus method?

進行中

Brannon King

2023年05月30日 20:14

• 
• 
• 

SCIP has SCIProwGetBasisStatus and SCIPcolGetBasisStatus methods. What is Gurobi's equivalent to these methods? This question relates to my larger goal of computing the corner rays at an optimal LP point.

関連

• Simplex

0

• 

  David Torres Sanchez

  • Gurobi Staff

  2023年06月01日 11:12

  Hi Brannon,

  Each variable has a VBasis attribute with values:

  0 (basic), -1 (non-basic at lower bound), -2 (non-basic at upper bound), and -3 (super-basic).

  Each linear constraint has CBasis attribute with values:

  0 (basic) or -1 (non-basic)

  Cheers, 
  David

  1
• 

  Brannon King

  2023年06月19日 19:50

  • 
  • 
  • 

  Each row has an associated slack variable. Does the slack variable use the same upper/lower status information? How would I determine this VBasis information for a slack variable, since CBasis doesn't specify upper/lower?

  0

サインインしてコメントを残してください。