标签：m60 avd row topk down tgid Koa jdb oba
import numpy as np
import matplotlib.pyplot as pltraw_data_X = [[3.393533211, 2.331273381],
[3.110073483, 1.781539638],
[1.343808831, 3.368360954],
[3.582294042, 4.679179110],
[2.280362439, 2.866990263],
[7.423436942, 4.696522875],
[5.745051997, 3.533989803],
[9.172168622, 2.511101045],
[7.792783481, 3.424088941],
[7.939820817, 0.791637231]
]
raw_data_y = [0, 0, 0, 0, 0, 1, 1, 1, 1, 1]X_train = np.array(raw_data_X)
y_train = np.array(raw_data_y)X_trainarray([[ 3.39353321, 2.33127338],
[ 3.11007348, 1.78153964],
[ 1.34380883, 3.36836095],
[ 3.58229404, 4.67917911],
[ 2.28036244, 2.86699026],
[ 7.42343694, 4.69652288],
[ 5.745052 , 3.5339898 ],
[ 9.17216862, 2.51110105],
[ 7.79278348, 3.42408894],
[ 7.93982082, 0.79163723]])
y_trainarray([0, 0, 0, 0, 0, 1, 1, 1, 1, 1])
plt.scatter(X_train[y_train==0,0], X_train[y_train==0,1], color=‘g‘)
plt.scatter(X_train[y_train==1,0], X_train[y_train==1,1], color=‘r‘)
plt.show()
预测：
x = np.array([8.093607318, 3.365731514])
plt.scatter(X_train[y_train==0,0], X_train[y_train==0,1], color=‘g‘)
plt.scatter(X_train[y_train==1,0], X_train[y_train==1,1], color=‘r‘)
plt.scatter(x[0], x[1], color=‘b‘)
plt.show()
from math import sqrt
distances = []
for x_train in X_train:
d = sqrt(np.sum((x_train - x)**2))
distances.append(d)distances[4.812566907609877, 5.229270827235305, 6.749798999160064, 4.6986266144110695, 5.83460014556857, 1.4900114024329525, 2.354574897431513, 1.3761132675144652, 0.3064319992975, 2.5786840957478887]
distances = [sqrt(np.sum((x_train - x)**2))
for x_train in X_train]distances[4.812566907609877, 5.229270827235305, 6.749798999160064, 4.6986266144110695, 5.83460014556857, 1.4900114024329525, 2.354574897431513, 1.3761132675144652, 0.3064319992975, 2.5786840957478887]
np.argsort(distances)array([8, 7, 5, 6, 9, 3, 0, 1, 4, 2])
nearest = np.argsort(distances)k = 6topK_y = [y_train[neighbor] for neighbor in nearest[:k]]topK_y[1, 1, 1, 1, 1, 0]
from collections import Counter
votes = Counter(topK_y)votesCounter({0: 1, 1: 5})
votes.most_common(1)[(1, 5)]
predict_y = votes.most_common(1)[0][0]predict_y1
标签：m60 avd row topk down tgid Koa jdb oba
原文地址：https://www.cnblogs.com/JasperZhao/p/12870699.html
