Extract rules from an rpart model

Extract interpretable decision rules from an rpart decision tree. Each terminal node becomes one rule representing the path from root to that leaf.

Usage

# S3 method for class 'rpart'
extract_rules(x, ...)

Arguments

x

An rpart object from the rpart package.

...

Not currently used.

Value

A tibble with class c("rule_set_rpart", "rule_set") and columns:

• id: integer, the terminal node ID.

• rules: list of R expressions, one per terminal node.

Examples

fit <- rpart::rpart(Species ~ ., data = iris)
extract_rules(fit)
#> # A tibble: 3 × 2
#>      id rules     
#>   <int> <list>    
#> 1     2 <language>
#> 2     6 <language>
#> 3     7 <language>