计算numpy数组中点内的欧几里得距离


问题内容

我有3D阵列

 A = [[x1 y1 z1]
      [x2 y2 z2]
      [x3 y3 z3]]

我必须找到每个点之间的欧氏距离,这样我会只之间的距离3获取输出(row0,row1)(row1,row2)(row0,row2)

我有一些代码

dist = scipy.spatial.distance.cdist(A,A, 'euclidean')

但是它将以矩阵形式给出距离为

dist= [[0  a   b]
       [a  0   c]
       [b  c   0]]

我希望结果为[a b c]


问题答案:

您可以执行以下操作:

>>> import numpy as np
>>> from itertools import combinations
>>> A = np.array([[1, 2, 3], [4, 5, 6], [10, 20, 30]])
>>> [np.linalg.norm(a-b) for a, b in combinations(A, 2)]
[5.196152422706632, 33.674916480965472, 28.930952282978865]