Rotation of Z Axis

Hallo zusammen,

I have following code to describe a rotation around the Z-Axis.

Code:

%
subplot(3,1,3);
vecInit  = [0, 0, 1];
vecBar3 = quatrotate(quatinv(Q), vecInit);
vecBar3 = -1 * atan2(vecBar3(:,1), vecBar3(:,2));
vecBar3 = vecBar3*180/pi;
plot(t, vecBar3)

Funktion ohne Link?

Q is a Nx4 Matrix, which has the information of the movement in form of quaternions.

Is it the correct idea or does somebody has a different, maybe easier, solution idea?

Answer 1

[Matt J]

You could use this,

https://www.mathworks.com/matlabcentral/fileexchange/30864-3d-rotation-about-shifted-axis

[Sven Dietrich]

Which syntax could I use, if I want to solve it with the quaternions?

[Matt J]

The tool doesn't use quaternions, but isn't the purpose to rotate a point about an axis?

[Sven Dietrich]

Yes nearly. I have a movement of a sensor which is shown in quaternions. And I would like to see the plot of X-Y-Plane to analyse the angle

[Matt J]

Syntax 3 will rotate a set of given points about an axis that you specify.