lpSolveAPI (version 5.5.2.0-17.6)

get.sensitivity.objex: Get Sensitivity: Objective Extended

Description

Retrieve the sensitivity of the objective function from a successfully solved lpSolve linear program model object.

Usage

get.sensitivity.objex(lprec)

Arguments

lprec

an lpSolve linear program model object.

Value

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.

References

http://lpsolve.sourceforge.net/5.5/index.htm

Examples

# NOT RUN {
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)
# }