我有一個緯度和經度對的數據幀.
這是我的數據幀外觀.
order_lat order_long
0 19.111841 72.910729
1 19.111342 72.908387
2 19.111342 72.908387
3 19.137815 72.914085
4 19.119677 72.905081
5 19.119677 72.905081
6 19.119677 72.905081
7 19.120217 72.907121
8 19.120217 72.907121
9 19.119677 72.905081
10 19.119677 72.905081
11 19.119677 72.905081
12 19.111860 72.911346
13 19.111860 72.911346
14 19.119677 72.905081
15 19.119677 72.905081
16 19.119677 72.905081
17 19.137815 72.914085
18 19.115380 72.909144
19 19.115380 72.909144
20 19.116168 72.909573
21 19.119677 72.905081
22 19.137815 72.914085
23 19.137815 72.914085
24 19.112955 72.910102
25 19.112955 72.910102
26 19.112955 72.910102
27 19.119677 72.905081
28 19.119677 72.905081
29 19.115380 72.909144
30 19.119677 72.905081
31 19.119677 72.905081
32 19.119677 72.905081
33 19.119677 72.905081
34 19.119677 72.905081
35 19.111860 72.911346
36 19.111841 72.910729
37 19.131674 72.918510
38 19.119677 72.905081
39 19.111860 72.911346
40 19.111860 72.911346
41 19.111841 72.910729
42 19.111841 72.910729
43 19.111841 72.910729
44 19.115380 72.909144
45 19.116625 72.909185
46 19.115671 72.908985
47 19.119677 72.905081
48 19.119677 72.905081
49 19.119677 72.905081
50 19.116183 72.909646
51 19.113827 72.893833
52 19.119677 72.905081
53 19.114100 72.894985
54 19.107491 72.901760
55 19.119677 72.905081
我想聚集這些彼此最近的點(距離200米)以下是我的距離矩陣.
from scipy.spatial.distance import pdist, squareform
distance_matrix = squareform(pdist(X, (lambda u,v: haversine(u,v))))
array([[ 0. , 0.2522482 , 0.2522482 , ..., 1.67313071,
1.05925366, 1.05420922],
[ 0.2522482 , 0. , 0. , ..., 1.44111548,
0.81742536, 0.98978355],
[ 0.2522482 , 0. , 0. , ..., 1.44111548,
0.81742536, 0.98978355],
...,
[ 1.67313071, 1.44111548, 1.44111548, ..., 0. ,
1.02310118, 1.22871515],
[ 1.05925366, 0.81742536, 0.81742536, ..., 1.02310118,
0. , 1.39923529],
[ 1.05420922, 0.98978355, 0.98978355, ..., 1.22871515,
1.39923529, 0. ]])
然后我在距離矩陣上應用DBSCAN聚類算法.
from sklearn.cluster import DBSCAN
db = DBSCAN(eps=2,min_samples=5)
y_db = db.fit_predict(distance_matrix)
我不知道如何選擇eps& min_samples值.它在一個星團中聚集了太遠的點.(距離約2公里)是因為它在聚類時計算歐氏距離？請幫忙.
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