get.sensitivity.objex {lpSolveAPI} | R Documentation |
Retrieve the sensitivity of the objective function from a successfully solved lpSolve linear program model object.
get.sensitivity.objex(lprec)
lprec |
an lpSolve linear program model object. |
a list with components
objfrom |
a numeric vector of length n (where n is the number of decision variables in lprec ) containing the values of the lower limits of the objective function. |
objtill |
a numeric vector of length n (where n is the number of decision variables in lprec ) containing the values of the upper limits of the objective function. |
objfromvalue |
a numeric vector of length n (where n is the number of decision variables in lprec ) containing the values of the variables at their lower limit. Only applicable when the value of the variable is 0 (rejected). |
objtillvalue |
not used in this version of lpSolve. |
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)) solve(lps.model) get.sensitivity.objex(lps.model)