getQuadCPLEX: Access a Range of Columns of the Matrix Q of a Model With a Quadratic Objective Function

Description

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

getQuadCPLEX(env, lp, begin, end)

env

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

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 columns to be returned.

end

An integer specifying the end of the range of columns to be returned.

If successful a list is returned:

qmatbeg

Array that specifies the nonzero elements of the columns. Consult the IBM ILOG CPLEX documentation for more detailed information.

qmatind

Array that specifies the nonzero elements of the columns. Consult the IBM ILOG CPLEX documentation for more detailed information.

qmatval

Array that specifies the nonzero elements of the columns. Consult the IBM ILOG CPLEX documentation for more detailed information.

otherwise an instance of class "'>cplexError".

Interface to the C function getQuad which calls the CPLEX function CPXgetquad.