quaternion does not work in matlab
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I am trying to use rotatepoint and quaternion. when I want to do matlab's example. an error ocurres.
the example is here:
x = 0.5;
y = 0.5;
z = 0;
plot(x,y,"ko")
hold on
axis([-1 1 -1 1])
quat = quaternion([0,0,pi/4; 0,0,-pi/2],"euler","XYZ","point");
rotatedPoint = rotatepoint(quat,[x,y,z])
-------------------------------------------------------------------
this is the error i get:(when using quaternion)
Index exceeds the number of array elements. Index must not exceed 1.
Error in matlabshared.rotations.internal.quaternionBase>partsFromEuler (line 256)
r3 = [arg3(3) arg3(2) arg3(1)];
Error in matlabshared.rotations.internal.quaternionBase>partsFromConversion (line 182)
[qa,qb,qc,qd] = partsFromEuler(arg1,arg2,arg3,arg4);
Error in matlabshared.rotations.internal.quaternionBase (line 59)
[obj.a,obj.b,obj.c,obj.d] = partsFromConversion(varargin{:});
Error in quaternion (line 109)
obj@matlabshared.rotations.internal.quaternionBase(varargin{:});
4 Comments
Dyuman Joshi
on 12 Oct 2023
Edited: Dyuman Joshi
on 12 Oct 2023
It could be. Using quaternion() and rotatepoint() requires toolboxes.
MATLAB Online says that one of the following is required for both -
Automated Driving Toolbox
Sensor Fusion and Tracking Toolbox
Navigation Toolbox
Radar Toolbox
Robotics System Toolbox
ROS Toolbox
UAV Toolbox
Computer Vision Toolbox
Check if you have any of the following toolboxes installed by typing "ver" in the command window.
Accepted Answer
Walter Roberson
on 12 Oct 2023
Moved: Walter Roberson
on 12 Oct 2023
As an experiment try
quat = quaternion([0,0,pi/4; 0,0,-pi/2],'euler','XYZ','point');
The R2022a documentation https://www.mathworks.com/help/releases/R2022a/driving/ref/quaternion.html?s_tid=doc_ta shows only using character vectors in those positions, not string objects, so it just might be the case that R2022a does not recognize string objects there.
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