print(__doc__)importnumpyasnpimportmatplotlib.pyplotaspltfromsklearn.datasetsimportload_irisfromsklearn.treeimportDecisionTreeClassifier, plot_tree# Parametersn_classes =3plot_colors ="ryb"plot_step =0.02# Load datairis = load_iris()forpairidx, pairinenumerate([[0,1], [0,2], [0,3], [1...
X_test_std=sc.transform(X_test)## 决策树分类器fromsklearn.treeimportDecisionTreeClassifier tree=DecisionTreeClassifier(criterion='gini',max_depth=4,random_state=1)tree.fit(X_train_std,y_train) plot_decision_region(X_train_std,y_train,classifier=tree,resolution=0.02) plt.xlabel('petal length ...
DecisionTreeClassifier 分类树 classsklearn.tree.DecisionTreeClassifier(criterion=’gini’,splitter=’best’,max_depth=None, min_samples_split=2,min_samples_leaf=1,min_weight_fraction_leaf=0.0,max_features=None, random_state=None,max_leaf_nodes=None,min_impurity_decrease=0.0,min_impurity_split=None...
hate each other like poison是什么意思 v. 互相恨之入骨 hatchet man是什么意思及反义词 n.受雇的杀人凶手,职业杀手,打手,走狗 hatchet job的中文解释 n.恶毒攻击,诽谤 hatchet face是什么意思及反义词 n.消瘦的脸 hatch a plot怎么翻译及发音 策划阴谋 hat in hand是什么意思及音标 adv.十分恭敬地 猜...
pyplotasplttest=[]foriinrange(10):clf=tree.DecisionTreeClassifier(max_depth=i+1,criterion='entropy',random_state=200,splitter='random')clf=clf.fit(x_train,y_train)score=clf.score(x_test,y_test)test.append(score)plt.figure(figsize=(10,8))plt.plot(range(1,...
# 需要导入模块: from sklearn import tree [as 别名]# 或者: from sklearn.tree importDecisionTreeClassifier[as 别名]defpredict(self, fit=None, features=None, probabilities=False):''' Predict the class labels (e.g., endmember types) based on an existing ...
plotAUC(test_y,clf.predict_proba(test_x)[:,1],'DT')returnauc 開發者ID:ds-ga-1001-final,項目名稱:project,代碼行數:7,代碼來源:decision_tree.py 示例5: decision_tree ▲點讚 1▼ defdecision_tree(train_bow,train_labels,test_bow,test_labels,bow_indexes):print("Training decision tree") ...
score accuracy = accuracy_score(target, predictions)print("Accuracy:", accuracy)7.可视化决策树：可以使用Scikit-learn提供的plot_tree函数可视化决策树。例如：python复制代码 from sklearn import tree tree.plot_tree(clf, filled=True)这将绘制一个决策树的图像，其中节点表示特征和决策，边表示决策规则。
Decision tree classifier to predict the right classes of the observations in the 'Iris' data set. rstudio rpart iris-dataset decisiontreeclassifier rpartplot Updated Jun 22, 2021 R muhammad3245571106 / Student-Grade-Prediction Star 1 Code Issues Pull requests This is the Data Mining Projec...
In Scikit-learn, optimization of decision tree classifier performed by only pre-pruning. Maximum depth of the tree can be used as a control variable for pre-pruning. In the following the example, you can plot a decision tree on the same data with max_depth=3. Other than pre-pruning param...