Decision Trees 官方文檔
Decision Trees 中文文檔
DecisionTreeClassifier 能夠二進制(其中標籤是[-1,1])分類和多類(其中標籤是[0,…,K-1])分類。
使用Iris數據集,我們可以構造一個樹,如下所示:
from sklearn.datasets import load_iris
from sklearn import tree
iris = load_iris()
clf = tree.DecisionTreeClassifier()
clf = clf.fit(iris.data, iris.target)
import graphviz
dot_data = tree.export_graphviz(clf, out_file=None)
graph = graphviz.Source(dot_data)
graph.render("iris")
dot_data = tree.export_graphviz(clf, out_file=None,
feature_names=iris.feature_names,
class_names=iris.target_names,
filled=True, rounded=True,
special_characters=True)
graph = graphviz.Source(dot_data)