目前,常见的距离如下:
(1) Minkowski Distance
(2) Euclidean Distance
(3) ManHattan Distance
(4) Chebyshev Distance
(5) Cosine
(6) HammingDistance
(7) Jaccard Similarity Coefficient
举实例如下:
from numpy import *
vector1 = mat([1,2,3,4])vector2 = mat([4,5,6,7])
#-----------------------------------------------
print("Euclidean=",sqrt((vector1-vector2)*\
((vector1-vector2).T)))
print("ManHattan=",sum(abs(vector1-vector2)))
print("Chebyshev=",abs(vector1-vector2).max())
#计算夹角余弦
Lv1 = sqrt(vector1*vector1.T)
Lv2 = sqrt(vector2*vector2.T)
cosV12 = vector1*vector