2017年2月18日 K-Nearest Neighbors 原

airxiechao

K-Nearest Neighbors predicts output from k nearest neighbors

``````from sklearn.datasets import load_boston
from sklearn.neighbors import NearestNeighbors
import numpy as np
import ml_metrics as mtr

X = data.data
y = data.target

nb = NearestNeighbors()
nb.fit(X)
predict = np.mean(y[nb.kneighbors(X, return_distance=False)], axis=1)
print 'score:', mtr.mse(predict, y)
#score: 23.9668624506``````

airxiechao

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