Access Presolve Status Information for Columns and Rows

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Description

Low level interface function to the IBM ILOG CPLEX function CPXgetprestat. Consult the IBM ILOG CPLEX documentation for more detailed information.

Usage

1
  getPreStatCPLEX(env, lp)

Arguments

env

An object of class "cplexPtr" as returned by openEnvCPLEX. This is basically a pointer to an IBM ILOG CPLEX environment.

lp

An object of class "cplexPtr" as returned by initProbCPLEX. This is basically a pointer to an IBM ILOG CPLEX problem object.

Details

Interface to the C function getPreStat which calls the CPLEX function CPXgetprestat.

Value

If successful a list is returned:

prestat

status of the presolved problem

pcstat

presolve status values of the columns

prstat

presolve status values of the rows

ocstat

presolve status values of the columns of the presolved problem

orstat

presolve status values of the rows of the presolved problem

otherwise an instance of class "cplexError".

Author(s)

Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>

Maintainer: Claus Jonathan Fritzemeier <clausjonathan.fritzemeier@uni-duesseldorf.de>

References

The IBM ILOG CPLEX home page at https://www.ibm.com/developerworks/university/academicinitiative/.

See Also

cplexConstants

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