Initializing help system before first use

problem.getScaledInfeas

Purpose
Returns a list primal and dual variables that are infeasible for the scaled original problem. If the problem is currently presolved, it is postsolved before the function returns.
Topic areas
LP, Numerics
Synopsis
x, slack, duals, djs = problem.getScaledInfeas()
Error value
422 
A solution is not available.
Related controls
Double
FEASTOL 
Tolerance on RHS.
OPTIMALITYTOL 
Reduced cost tolerance.

Related controls
Integer
SCALING 
Type of scaling

Return value
x 
Integer array containing the indices of the primal infeasible variables.
slack 
Integer array containing the indices of the primal infeasible rows.
duals 
Integer array containing the indices of the dual infeasible rows.
djs 
Integer array containing the indices of the dual infeasible variables.
Further information
1. The returned row/column indices range from 0 to ORIGINALROWS-1/ ORIGINALCOLS-1.
2. This function is the same as problem.getInfeas, except it checks for infeasibility before unscaling the problem. The two functions will behave differently only when scaling before presolve has been enabled, by setting bit 9 in SCALING.
3. This function applies to linear and convex quadratic (including second order conic) problems only.
Related topics
problem.getInfeas, problem.getIISData, problem.IISAll, problem.clearIIS, problem.firstIIS, problem.IISIsolations, problem.nextIIS, problem.IISStatus, problem.writeIIS

Parent Topic Methods of the class problem

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