How to calculate distance between a set of point to multiple point

Question

Shin 2023-1-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1891425-how-to-calculate-distance-between-a-set-of-point-to-multiple-point

编辑： Dyuman Joshi 2023-1-11

Hi there, I have two sets of coordinates,

setA = [2,1; 2,3; 4,6];
setB = [8,8; 9,8; 3,7; 5,8; 9,2; 3,4; 5,7];

and I wanted to calculate the distance between the two sets, for example, the first coordinate of "setA" [2,1] to all the coordinates in "setB" and the second coordinate in "setA" [2,3] also with the all in "setB", and so on..., and at the end, i'll have 7 sets of distance calculated in each of the "setA", how can I do it? Thanks.

-Chann-

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Answer 1

Dyuman Joshi 2023-1-10

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1891425-how-to-calculate-distance-between-a-set-of-point-to-multiple-point#answer_1145570

编辑：Dyuman Joshi 2023-1-11

在 MATLAB Online 中打开

setA = [2,1; 2,3; 4,6];
setB = [8,8; 9,8; 3,7; 5,8; 9,2; 3,4; 5,7];
%single element
dist=vecnorm(setB-setA(1,:),2,2)
dist = 7×1
    9.2195
    9.8995
    6.0828
    7.6158
    7.0711
    3.1623
    6.7082
%for all the points in setA
s=size(setA,1);
%pre-allocation 
y=cell(1,s);
for idx=1:s
    y{1,idx}=vecnorm(setB-setA(idx,:),2,2);
end
y
y = 1×3 cell array
    {7×1 double}    {7×1 double}    {7×1 double}
%you can compare the values to the above result for reference
y{1}
ans = 7×1
    9.2195
    9.8995
    6.0828
    7.6158
    7.0711
    3.1623
    6.7082