angle between three points (in 3D)?

8 views (last 30 days)

Show older comments

pacharya on 6 Feb 2020

0
Link

Direct link to this question

https://se.mathworks.com/matlabcentral/answers/503971-angle-between-three-points-in-3d

Answered: James Tursa on 6 Feb 2020

Accepted Answer: darova

test.xlsx

Hello Everyone,

I am trying to find an angle between two segments (Shoulder - Elbow and Elbow - Wrist) where Shoulder, Elbow and Wrist are the three points in the space which have x, y and z points and they have 1000 points. I am a little confused about how to calculate the angle when I have 1000 points? For the reference, I have attached the excel document and the figure. Thank you !

PA

0 Comments
Show -2 older commentsHide -2 older comments

Sign in to comment.

Sign in to answer this question.

Accepted Answer

darova on 6 Feb 2020

0
Link

Direct link to this answer

https://se.mathworks.com/matlabcentral/answers/503971-angle-between-three-points-in-3d#answer_414168

Use dot product

220px-Inner-product-angle.svg.png

0 Comments
Show -2 older commentsHide -2 older comments

Sign in to comment.

More Answers (1)

James Tursa on 6 Feb 2020

0
Link

Direct link to this answer

https://se.mathworks.com/matlabcentral/answers/503971-angle-between-three-points-in-3d#answer_414182

See the discussion in these links:

https://www.mathworks.com/matlabcentral/answers/101590-how-can-i-determine-the-angle-between-two-vectors-in-matlab

https://www.mathworks.com/matlabcentral/answers/501449-angle-betwen-two-3d-vectors-in-the-range-0-360-degree

0 Comments
Show -2 older commentsHide -2 older comments

Sign in to comment.

Sign in to answer this question.

Categories

MATLAB Language Fundamentals Matrices and Arrays

Find more on Matrices and Arrays in Help Center and File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!