Problem 46669. Rotation matrix of a sequence of 3D points

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Solution 3111146

Submitted on 8 Oct 2020

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1 Comment

Marco Torres on 8 Oct 2020

I tried the next function, but there is an error in the decimals. I got this result:

y_correct = [0.4347 0.7167
0.2266 0.5861
0.3375 0.9331]

function Rotated_Vector = RotTimesVec(Rotation_Matrix,Vector)
[a,b,Dim] = size(Rotation_Matrix);
Rotated_Vector = [];
for n=1:Dim
Ans = Vector(:,:,n)*Rotation_Matrix(:,:,n);
Rotated_Vector = [Rotated_Vector Ans'];
end

end

Test Suite

Test	Status	Code Input and Output
1	Fail	Rotation_Matrix(:,:,1) = [0.9129 0.8099 0.0542; 0.4817 0.1868 0.6090; 0.8518 0.2472 0.7772]; Rotation_Matrix(:,:,2) = [0.5111 0.5009 0.6256; 0.0278 0.3320 0.5751; 0.9904 0.1739 0.7510]; Vector(:,:,1) = [0.1535 0.3568 0.1440]; Vector(:,:,2) = [0.8506 0.3379 0.2752]; y_correct = [0.4346 0.7166; 0.2266 0.5861; 0.3375 0.9332]; assert(isequal(RotTimesVec(Rotation_Matrix,Vector),y_correct)) Assertion failed.

Test

Status

Code Input and Output

Fail

Rotation_Matrix(:,:,1) = [0.9129 0.8099 0.0542; 0.4817 0.1868 0.6090; 0.8518 0.2472 0.7772]; Rotation_Matrix(:,:,2) = [0.5111 0.5009 0.6256; 0.0278 0.3320 0.5751; 0.9904 0.1739 0.7510]; Vector(:,:,1) = [0.1535 0.3568 0.1440]; Vector(:,:,2) = [0.8506 0.3379 0.2752]; y_correct = [0.4346 0.7166; 0.2266 0.5861; 0.3375 0.9332]; assert(isequal(RotTimesVec(Rotation_Matrix,Vector),y_correct))

Assertion failed.

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Problem 46669. Rotation matrix of a sequence of 3D points

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