sklearn实战:使用knn进行回归拟合
%matplotlib inlineimport matplotlib.pyplot as pltimport numpy as np# 生成训练样本n_dots = 40X = 5 * np.random.rand(n_dots, 1)y = np.cos(X).ravel()# 添加一些噪声y += 0.2 * np.random.rand(n_dots) - 0.1...