distance between vectors in matlab???

5 次查看（过去 30 天）

mmm ssss 2012-4-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/34376-distance-between-vectors-in-matlab

i have a vector of 85*1 size and a matrix contains 85*396.

i need to find the distance between the 85*1 vector and all the vectors(columns ) of the matrix gamma and returns the closest distance and the column that give me this distance , how can i do this by matlab ???

thanks for all

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。

采纳的回答

Titus Edelhofer 2012-4-3

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/34376-distance-between-vectors-in-matlab#answer_43085

在 MATLAB Online 中打开

Hi,

bsxfun is your friend:

x = rand(85, 1);
A = rand(85, 396);
dist = bsxfun(@minus, A, x);
dist2 = sqrt(sum(dist.*dist));
[mindist, column] = min(dist2);

Titus

3 个评论
显示 1更早的评论隐藏 1更早的评论

Titus Edelhofer 2012-4-3

Hi,

x and A were just examples, I thought that the matrix (gamma) and the vector (features) are given. So: remove the first two lines above and start with the line dist = ..., if variables gamma and features are there ...

Titus

mmm ssss 2012-4-3

O000k .but i think that measuring the similarity between the vectors by finding distances between them is not very good , isn't it ?can i know your opinion?

请先登录，再进行评论。