Euclidean distance explanation for a matrix

Question

Damith 2014-3-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/121451-euclidean-distance-explanation-for-a-matrix

评论： Damith 2014-3-14

         A         B         C         D
      0   93.0000   12.0000    9.0000
14.0000  102.0000   75.0000   33.0000
      0    5.0000   34.0000   33.0000
11.5000   50.0000   81.0000   36.0000

I have the above matrix. When I preform pdist(<above matric>,'euclidean') for euclidean distance, I got the following answer. Can somebody explain what these euclidean distance means for a (4 x 4) matrix above? I cannot understand how these values are calculated.

69.4406 93.8296 86.4364 106.2356 52.4905 66.1457

Thanks.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Mischa Kim 2014-3-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/121451-euclidean-distance-explanation-for-a-matrix#answer_128325

编辑：Mischa Kim 2014-3-14

Damit, computing the pdist of an m-by-n ( 4-by-4 in your case) matrix means computing the pairwise distance between each of the m rows. For 2 rows you get one result, for 3 rows 3 (1-2, 1-3, 2-3), for 4 rows 6.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Damith 2014-3-14

Thank you Mischa,

I need to calculate Euclidean N-correlation distance of the matrix. Do you know how to calculate that in MATLAB? Then I need to find what elements in the matrix are closely related by using the correlation distance estimates.

I assume what you meant here it compares 1st row with 2nd row etc.(1-2, 1-3, 2-3).right?

Thanks again for your reply.

请先登录，再进行评论。