Find distances between all points
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Hi,
I have four landmarks which are A,B,C,D
These landmarks have the coordinates in x,y vectors respectively:
x = [1, 2, 3, 4] y = [1, 3, 4, 3]
Now I want to find the distance (using distance formula for two points) between all the points but avoid repetition. So for example I want to find the distances:
AB/AC/AD/BC/BD/CD
Any help is appreciated thanks.
回答（1 个）
Image Analyst
2014-6-1
Can I assume you tried the obvious, simple, straightforward, intuitive brute force approach?
x = [1, 2, 3, 4];
y = [1, 3, 4, 3]
for xIndex = 1 : length(x)
for yIndex = xIndex : length(y)
distances(xIndex, yIndex) = sqrt((x(xIndex)-x(yIndex))^2 + (y(xIndex)-y(yIndex))^2)
end
end
distances % Report to the command window.
If you already tried this obvious brute force approach and didn't like it for some reason then say what's wrong with it?
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