get.sensitivity.objex: Get Sensitivity: Objective Extended

In lpSolveAPI: R Interface to 'lp_solve' Version 5.5.2.0

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.

Author(s)

Kjell Konis [e-mail]

References

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

Examples

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)

Example output

[1] 0
$objfrom
[1] -3.2e+00 -1.0e+30 -3.2e+00

$objtill
[1]  1.00e+30 -3.75e+00  1.00e+30

$objfromvalue
[1]  1e+01 -1e+30  1e+01

$objtillvalue
[1] 0 0 0

lpSolveAPI documentation built on May 2, 2019, 6:50 p.m.