## Calculate the distance squared of a point in 3d space

### Devdolly Saini (view profile)

on 10 Sep 2019
Latest activity Commented on by Rena Berman

### Rena Berman (view profile)

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

Stephen Cobeldick

### Stephen Cobeldick (view profile)

on 13 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
Rik

### Rik (view profile)

on 13 Sep 2019
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

on 19 Sep 2019

R2019a

### Bruno Luong (view profile)

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