FInd distance between surface coordinates without repetition

Hi

Suppose, I have list of 4 coordinates -

x[ -32.8778 -10.8573 11.3161 33.4895]

Y[-32.8778 -10.8573 11.3161 33.4895]

i want to calculate distance between all possible combinations (x and y) without repetition, in a for loop (as i need to perform this with larger dataset).

and getting a distance matrix along with coresponding x, y position.

could you please help me?

thanks in advance..!

Answer 1

[Marco Riani]

If x and y are

x=[ -32.8778  -10.8573   11.3161   33.4895];
y=[ -32.8778  -10.8573   11.3161   33.4895];

the distance matrix is

abs(x'-y)

0 22.0205 44.1939 66.3673

22.0205 0 22.1734 44.3468

44.1939 22.1734 0 22.1734

66.3673 44.3468 22.1734 0

or I am missing something of your question?

[Abhilash Uniyal]

ok let me put this way.

I have 4 different coordinates.

ex point 1 =x(1),y(1)

from which i have saparated each x position and y position.

x=[x1 x2 x3 x4]

y=[y1 y2 y3 y4]

distance from point 1 to 2-

point 1 to 2=sqrt(y(1)-y(2))^2+(x(1)-x(2))^2);

Answer 2

[Marco Riani]

Thanks for the clarification. Please let me know if the code below is what you wanted

% Define x and y
x=1:4;
y=2:5;
lx=length(x);
D=zeros(lx,lx);
for i=1:lx
    for j=1:lx
        D(i,j)=sqrt((x(i)-x(j))^2+(y(i)-y(j))^2);
    end
end