getRowsCPLEX: Accesses a Range of Rows of the Constraint Matrix

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

Description

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

Usage

  getRowsCPLEX(env, lp, begin, end)

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.
begin	An integer specifying the beginning of the range of rows to be returned.
end	An integer specifying the end of the range of rows to be returned.

Details

Interface to the C function getRows which calls the CPLEX function CPXgetrows.

Value

If successful a list is returned:

matbeg	Array that specifies the nonzero elements of the rows. Consult the IBM ILOG CPLEX documentation for more detailed information.
matind	Array that specifies the nonzero elements of the rows. Consult the IBM ILOG CPLEX documentation for more detailed information.
matval	Array that specifies the nonzero elements of the rows. Consult the IBM ILOG CPLEX documentation for more detailed information.

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.