如果这是我的数据集的快照。
Row Group x y z Survive
1 1 0.0680 0.8701 0.0619 78.43507
2 1 0.9984 0.0016 0.0000 89.55533
3 1 0.4146 0.5787 0.0068 85.35468
4 2 0.3910 0.6016 0.0074 67.49987
5 2 0.3902 0.6023 0.0075 81.87669
6 2 0.0621 0.8701 0.0678 27.26777
如何计算第1组中每行/观测值与第2组中每个观测值之间的马氏距离？
Row1-Group1 { Row4-Group2 , Row5-Group2 , Row6-Group2 }
Row2-Group1 { Row4-Group2 , Row5-Group2 , Row6-Group2 }
Row3-Group1 { Row4-Group2 , Row5-Group2 , Row6-Group2 }
类似这样的东西
r4g2 r5g2 r6g2
r1g1 0.4235 0.4225 0.0083
r2g1 0.8538 0.8549 1.2789
r3g1 0.0329 0.0340 0.4614