Calculate the distance squared of a point in 3d space

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Devdolly Saini 2019-9-10

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https://ww2.mathworks.cn/matlabcentral/answers/479667-calculate-the-distance-squared-of-a-point-in-3d-space

关闭： MATLAB Answer Bot 2021-8-20

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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Rik 2019-9-13

It is considered extemely rude to edit away your question. Bruno has requested the site admins to revert the edit for this question. Please don't edit away your questions in the future. If you want private help you should hire a consultant.

Rena Berman 2019-9-19

(Answers Dev) Restored edit

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回答（1 个）

Bruno Luong 2019-9-10

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https://ww2.mathworks.cn/matlabcentral/answers/479667-calculate-the-distance-squared-of-a-point-in-3d-space#answer_391178

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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