KNN鸢尾花分类
import matplotlib.pyplot as plt
from sklearn.neighbors import KNeighborsClassifier
from sklearn import datasets
import numpy as np
X,y datasets.load_iris(True) #返回x、y
X X[:,:2]
plt.scatter(X[:,0],X[:,1],cy)
knn KNeighborsClassifier(…
文章目录 1.K-近邻算法小例子评价 2.K-近邻模型2.1 距离度量 L p L_p Lp距离欧氏距离(Euclidean Distance)曼哈顿距离(Manhattan Distance)其它 2.2 k \large k k 值的选择不同k值的影响特例: k 1 k1 k1࿰…