set_bounds: Set the bounds of a variable

In dirkschumacher/ompr: Model and Solve Mixed Integer Linear Programs

Set the bounds of a variable

Description

Change the lower and upper bounds of a named variable, indexed variable or a group of variables.

Usage

set_bounds(.model, .variable, ..., lb = NULL, ub = NULL)

set_bounds_(.model, .variable, ..., lb = NULL, ub = NULL, .dots)

Arguments

.model	the model
.variable	the variable name/definition or a linear constraint
...	quantifiers for the indexed variable
lb	the lower bound of the variable.
ub	the upper bound of the variable For MIPModel you can also pass (in)equalities to define bounds. Please look at the examples.
.dots	Used to work around non-standard evaluation.

Examples

library(magrittr)
MIPModel() %>%
  add_variable(x[i], i = 1:5) %>%
  add_constraint(x[i] >= 1, i = 1:5) %>% # creates 5 constraints
  set_bounds(x[i], lb = 3, i = 1:3) %>%
  variable_bounds()

MIPModel() %>%
  add_variable(x[i], i = 1:5) %>%
  set_bounds(x[i] <= i, i = 1:5) %>% # upper bound
  set_bounds(x[i] >= 0, i = 1:5) %>% # lower bound
  set_bounds(x[5] == 45) %>%
  variable_bounds()

dirkschumacher/ompr documentation built on Sept. 16, 2023, 4:03 p.m.