利用支持向量机来分类鸢尾花
from sklearn import svm
import numpy as np
import matplotlib.pyplot as plt
import matplotlib...x_test, y_train, y_test = train_test_split(x, y, random_state=1, train_size=0.6)
# clf = svm.SVC(C=...:x2_max:200j] # 生成网格采样点
grid_test = np.stack((x1.flat, x2.flat), axis=1) # 测试点
mpl.rcParams['font.sans-serif...alpha = 0.5
plt.pcolormesh(x1, x2, grid_hat, cmap=cm_light) # 预测值的显示
plt.plot(x[:, 0], x[:, 1], '...markeredgecolor='k')
plt.scatter(x_test[:, 0], x_test[:, 1], s=120, facecolors='none', zorder=10) # 圈中测试集样本