validatetools (version 0.6.1)

is_infeasible: Check the feasibility of a rule set

Description

An infeasible rule set cannot be satisfied by any data because of internal contradictions: the combination of the rules make it inconsistent. This function checks whether the record-wise linear, categorical and conditional rules in a rule set are consistent. Note that is it wise to also check detect_contradicting_if_rules(): conditional If-rules may not be strictly inconsistent, but can be semantically inconsistent.

Usage

is_infeasible(x, ..., verbose = interactive())

Value

TRUE or FALSE

Arguments

x

validator object with validation rules.

...

not used

verbose

if TRUE print information to the console

See Also

Other feasibility: detect_boundary_cat(), detect_boundary_num(), detect_contradicting_if_rules(), detect_infeasible_rules(), is_contradicted_by(), make_feasible()

Examples

rules <- validator( x > 0)

is_infeasible(rules)

# infeasible system!
rules <- validator( rule1 = x > 0
                  , rule2 = x < 0
                  )

is_infeasible(rules)

detect_infeasible_rules(rules, verbose=TRUE)

# but we want to keep rule1, so specify that it has an Inf weight
detect_infeasible_rules(rules, weight=c(rule1=Inf), verbose=TRUE)

# detect and remove
make_feasible(rules, weight=c(rule1=Inf), verbose = TRUE)

# find out the conflict with rule2
is_contradicted_by(rules, "rule2", verbose = TRUE)