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Extract the objective function from a model

Usage

objective_function(model)

Arguments

model

the model

Value

a list with two named elements, 'solution' and 'constant'. 'solution' is a sparse vector from the Matrix package. 'constant' is a constant that needs to be added to get the final obj. value.

Examples

library(magrittr)
model <- MIPModel() %>%
  add_variable(x[i], i = 1:5) %>%
  set_objective(sum_over(i * x[i], i = 1:5) + 10)
objective_function(model)
#> $solution
#> sparse vector (nnz/length = 5/5) of class "dsparseVector"
#> [1] 1 2 3 4 5
#> 
#> $constant
#> [1] 10
#>