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Calculate the distance squared of a point in 3d space

Asked by Devdolly Saini on 10 Sep 2019
Latest activity Commented on by Rena Berman on 19 Sep 2019
how do I calculate the squared distance between two points in 3d space where the 2 inputs say P and Q and 1d arrays say P=[P1,P2,P3] and Q=[Q1,Q2,Q3]
so far i have the following but i don't think thats correct but I think im on the right track.
function [distanceSquared] = PixelDistance(P,Q)
P=[P1,P2,P3]
Q=[Q1,Q2,Q3]
distanceSquared =(P1-Q1).^2 +(P2-Q2).^2 +(P3-Q3).^2
end
thanks

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Original Question (from Google Cache):
how do I calculate the squared distance between two points in 3d space where the 2 inputs say P and Q and 1d arrays say P=[P1,P2,P3] and Q=[Q1,Q2,Q3]
so far i have the following but i don't think thats correct but I think im on the right track.
function [distanceSquared] = PixelDistance(P,Q)
P=[P1,P2,P3]
Q=[Q1,Q2,Q3]
distanceSquared =(P1-Q1).^2 +(P2-Q2).^2 +(P3-Q3).^2
end
thanks
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1 Answer

Answer by Bruno Luong
on 10 Sep 2019

function [distanceSquared] = PixelDistance(P,Q)
P1 = P(1); P2 = P(2); P3 = P(3);
Q1 = Q(1); Q2 = Q(2); Q3 = Q(3);
distanceSquared =(P1-Q1).^2 +(P2-Q2).^2 +(P3-Q3).^2
end

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