get.mat {lpSolveAPI} | R Documentation |
Retrieve a single element from the matrix of constraints.
get.mat(lprec, i, j)
lprec |
an lpSolve linear program model object. |
i |
a single numeric value from the set {1, ..., m} (where m is the number of constraints in lprec ) specifying the row of the matrix element. |
j |
a single numeric value from the set {1, ..., n} (where n is the number of decision variables in lprec ) specifying the column of the matrix element. |
a single numeric value.
Kjell Konis kjell.konis@epfl.ch
http://lpsolve.sourceforge.net/5.5/index.htm
lps.model <- make.lp(0, 3) xt <- c(6,2,4) add.constraint(lps.model, xt, "<=", 150) xt <- c(1,1,6) add.constraint(lps.model, xt, ">=", 0) xt <- c(4,5,4) add.constraint(lps.model, xt, "=", 40) set.objfn(lps.model, c(-3,-4,-3)) get.mat(lps.model, 2, 2)