Checking every norm of a row in a matrix with all other rows.

Question

gamer 2021-6-12

评论： gamer 2021-6-12

Hello community,

I have another question. It would be really nice if you could help me:)

So I ve got a nx2 matrix.

p=[r + (a-2*r)*rand(n,1),r + (b-2*r)*rand(n,1)];

Every row should be seen as one vector. Now I want to check the Euclidean norm/distance of each row with all other rows.

So I want to check norm ( row1 -row2), (row1-row3) etc. but also (row 4 - rown).

Thanks for your help!

With this for loop I can check the Euclidean norm/distance with row1 to all others. But I dont know how to check now row 3 and 4 etc.

for i = 1:n
    norm(p(i,:)-p(1,:))
end

Answer 1

Walter Roberson 2021-6-12

dists = pdist(p);

The default is euclidean norm.

The result would be n x n

gamer 2021-6-12

Wow thank you so much!!!!