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Add initial classification tree support, some minor fixes

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Aleksey Filippov 2025-02-22 19:27:06 +04:00
parent 9eb4492feb
commit dec4025331
1 changed files with 8 additions and 2 deletions
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10
src/rules.py
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@ -71,7 +71,7 @@ class Rule:
# https://mljar.com/blog/extract-rules-decision-tree/ # https://mljar.com/blog/extract-rules-decision-tree/
def get_rules(tree, feature_names) -> List[Rule]: def get_rules(tree, feature_names, classes=None) -> List[Rule]:
tree_ = tree.tree_ tree_ = tree.tree_
feature_name = [ feature_name = [
feature_names[i] if i != TREE_UNDEFINED else "undefined!" for i in tree_.feature feature_names[i] if i != TREE_UNDEFINED else "undefined!" for i in tree_.feature
@ -91,7 +91,11 @@ def get_rules(tree, feature_names) -> List[Rule]:
p2.append(RuleAtom(name, ComparisonType.GREATER, threshold)) p2.append(RuleAtom(name, ComparisonType.GREATER, threshold))
recurse(tree_.children_right[node], p2, rules) recurse(tree_.children_right[node], p2, rules)
else: else:
rules.append(Rule(antecedent, tree_.value[node][0][0])) if classes is None:
rules.append(Rule(antecedent, tree_.value[node][0][0]))
else:
value = np.argmax(tree_.value[node][0])
rules.append(Rule(antecedent, classes[value]))
recurse(0, antecedent, rules) recurse(0, antecedent, rules)
@ -302,6 +306,8 @@ def _get_fuzzy_rules(
for rule in rules: for rule in rules:
antecedent = [] antecedent = []
for atom in rule.get_antecedent(): for atom in rule.get_antecedent():
if fuzzy_variables.get(atom.get_varaible(), None) is None:
continue
antecedent.append( antecedent.append(
_get_fuzzy_rule_atom( _get_fuzzy_rule_atom(
fuzzy_variables[atom.get_varaible()], atom.get_value() fuzzy_variables[atom.get_varaible()], atom.get_value()