getGradCPLEX: Project the Impact of Making Changes to Optimal Variable...

In cplexAPI: R Interface to C API of IBM ILOG CPLEX

Description

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

Usage

  getGradCPLEX(env, lp, j)

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.
j	An integer specifying the index of the column of interest.

Details

Interface to the C function getGrad which calls the CPLEX function CPXgetgrad.

Value

If successful a list is returned:

head	listing of the indices of the basic variables in the order in which they appear in the basis.
y	coefficients of the j-th column relative to the current basis.

otherwise an instance of class "cplexError".

Author(s)

Gabriel Gelius-Dietrich <[e-mail]>

Maintainer: Mayo Roettger <[e-mail]>

References

The IBM ILOG CPLEX home page at https://www.ibm.com/support/knowledgecenter/SSSA5P.

cplexAPI documentation built on Oct. 23, 2020, 5:45 p.m.