math - Angle between two vectors matlab

Question

posted Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

I want to calculate the angle between 2 vectors V = [Vx Vy Vz] and B = [Bx By Bz]. is this formula correct?

VdotB = (Vx*Bx + Vy*By + Vz*Bz)

 Angle = acosd (VdotB / norm(V)*norm(B))

and is there any other way to calculate it?

My question is not for normalizing the vectors or make it easier. I am asking about how to get the angle between this two vectors

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1 Reply

深蓝 · Answer 1 · 2021-10-17T03:05:47+0000

replyed Oct 17, 2021 by 深蓝 (71.8m points)

Based on this link, this seems to be the most stable solution:

atan2(norm(cross(a,b)), dot(a,b))

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