

import numpy as np import matplotlib.pyplot as plt from matplotlib.colors import ListedColormap from matplotlib.font_manager import FontProperties from sklearn import datasets from sklearn.tree import DecisionTreeClassifier %matplotlib inline font = FontProperties(fname='/Library/Fonts/Heiti.ttc')
iris_data = datasets.load_iris() X = iris_data.data[:, [2, 3]] y = iris_data.target label_list = ['山鸢尾', '杂色鸢尾', '维吉尼亚鸢尾']