dual: Extracts the dual value (shadow cost) of a constraint.

In jlepird/raml: Algebraic Modeling Language for Linear and Integer Programs

Description

Extracts the dual value (shadow cost) of a constraint.

Usage

dual(m, constr)

dual(m, constr)

Arguments

m	The model object.
constr	The constraint in question.

Value

The dual value (shadow cost) of a constraint. Returns NA if there are integer or binary variables in the model.

Examples

m <- Model()
m$var(x >= 0)
m$objective(x)
m$constraint(x >= 0.1)
m$solve()
dual(m, x >= 0.1)  # 1.0

jlepird/raml documentation built on May 19, 2019, 12:46 p.m.