\name{getNumNnz-methods} \docType{methods} \encoding{utf8} \alias{getNumNnz} \alias{getNumNnz-methods} \alias{getNumNnz,optObj_clpAPI-method} \alias{getNumNnz,optObj_cplexAPI-method} \alias{getNumNnz,optObj_glpkAPI-method} \title{Retrieve the Number of Non-Zero Elements of the Constraint Matrix} \description{ Retrieve the number of non-zero elements in the constraint matrix of the optimization problem. } \usage{ \S4method{getNumNnz}{optObj_clpAPI}(lp) \S4method{getNumNnz}{optObj_cplexAPI}(lp) \S4method{getNumNnz}{optObj_glpkAPI}(lp) } \section{Methods}{ \describe{ \item{\code{signature(lp = "optObj_clpAPI")}}{ method to use with package \pkg{optObj_clpAPI}. } \item{\code{signature(lp = "optObj_cplexAPI")}}{ method to use with package \pkg{optObj_cplexAPI}. } \item{\code{signature(lp = "optObj_glpkAPI")}}{ method to use with package \pkg{optObj_glpkAPI}. } } } \arguments{ \item{lp}{ An object extending class \code{\linkS4class{optObj}}. } } \value{ A single numeric value. } \author{ Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de> Maintainer: Claus Jonathan Fritzemeier <clausjonathan.fritzemeier@uni-duesseldorf.de> } \seealso{ Superclass \code{\linkS4class{optObj}} and constructor function \code{\link{optObj}}. } \keyword{methods} \keyword{optimize}