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problem.calcSolInfo

Purpose
Calculates the required property of a solution, like maximum infeasibility of a given primal and dual solution.
Topic area
Solution
Synopsis
value = problem.calcSolInfo(property, solution=None, duals=None)
Arguments
property 
Defined the property to be calculated.
xpress.SolInfo.ABSPRIMALINFEAS 
the calculated maximum absolute primal infeasibility is returned.
xpress.SolInfo.RELPRIMALINFEAS 
the calculated maximum relative primal infeasibility is returned.
xpress.SolInfo.ABSDUALINFEAS 
the calculated maximum absolute dual infeasibility is returned.
xpress.SolInfo.RELDUALINFEAS 
the calculated maximum relative dual infeasibility is returned.
xpress.SolInfo.MAXMIPFRACTIONAL 
the calculated maximum absolute MIP fractionality or SOS infeasibility.
xpress.SolInfo.ABSMIPINFEAS 
the calculated maximum absolute MIP infeasibility (including delayed rows, indicators, general and piecewise linear constraints) is returned.
xpress.SolInfo.RELMIPINFEAS 
the calculated maximum relative MIP infeasibility (including delayed rows, indicators, general and piecewise linear constraints) is returned.
solution 
Double array of length ORIGINALCOLS that holds the solution. May be None when asking for dual infeasibility.
duals 
Double array of length ORIGINALROWS that holds the dual solution. May be None when asking for primal/MIP infeasibility.
Return value
value 
The calculated value.
Further information
1. This function applies to linear and convex quadratic (including second order conic) problems only.
2. The calculations are always carried out in the original problem, even if the problem is currently presolved.
Related topics
problem.calcSlacks, problem.calcObjective, problem.calcReducedCosts.

Parent Topic Methods of the class problem

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