# How can I find distances between 100 points such that I have a set of distances of each point from rest of the points.

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Hi Everyone,

I have distributed 100 points randomly in a 100x100x100 m3 3D space. I want to find distance of each point from rest of 99 points such that I have a distance set of 4950 different values. so the distance of 1st node from resy 99 nodes and then distance of 2nd node from rest 98 nodes and so on.

I cannot change the style of the code since I have values saved in these variables.

I have following code:

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n=100;

xm=100;

ym=100;

zm=100;

x=0;

y=0;

z=0;

for i=1:1:n

for j=1:1:i

for k=1:1:j

if (i==j && j==k & k==i) % so I dont get 100x100x100 different values and only 100 values with x,y,z coordinates.

S(i).xd=(1,1)*xm; %I cannot change this

XR(i)=S(i).xd;

S(j).yd=rand(1,1)*ym;

YR(j)=S(j).yd;

S(k).zd=rand(1,1)*zm;

ZR(k)=S(k).zd;

Points=[XR;YR;ZR]

end

end

end

##### 0 Comments

### Answers (1)

Ameer Hamza
on 2 Jan 2021

Just use pdist() function

X = [..]; % create 100x3 matrix

dists = pdist(X)

##### 3 Comments

Ameer Hamza
on 2 Jan 2021

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