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Create a mip object from a validator object

Source: R/MipRules.R
MipRules-class.Rd

Create a mip object from validate::validator() object. This is a utility class that translates a validor object into a mixed integer problem that can be solved. Most users should use locate_errors() which will handle all translation and execution automatically. This class is provided so users can implement or derive an alternative solution.

Methods

The MipRules class contains the following methods:

  • $execute() calls the mip solver to execute the rules.

  • $to_lp(): transforms the object into a lp_solve object

  • $is_infeasible Checks if the current system of mixed integer rules is feasible.

  • $set_values: set values and weights for variables (determines the objective function).

See also

Other Mixed Integer Problem: inspect_mip()

Examples

rules <- validator(x > 1)
mr <- miprules(rules)
mr$to_lp()
#> Model name: errorlocate
#>              x            
#> Minimize     0            
#> V1          -1  <=  -1.001
#> Kind       Std            
#> Type      Real            
#> Upper      Inf            
#> Lower     -Inf            
mr$set_values(c(x=0), weights=c(x=1))
mr$execute()
#> $s
#> [1] 0
#> 
#> $solution
#> [1] TRUE
#> 
#> $values
#>        x .delta_x 
#>    1.001    1.000 
#> 
#> $lp
#> Model name: errorlocate
#>                        x        .delta_x       
#> Minimize               0  1.600760886212       
#> x_ub                   1          -1e+07  <=  0
#> Kind                 Std             Std       
#> Type                Real             Int       
#> Upper                Inf               1       
#> Lower              1.001               0       
#> 
#> $adapt
#>    x 
#> TRUE 
#> 
#> $errors
#>    x 
#> TRUE 
#>