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

Created by Matteo Lo Preti

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<div style = "text-align: start; line-height: 20.4333px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: rgb(0, 0, 0); white-space: normal; "><div style="block-size: 42px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 21px; transform-origin: 407px 21px; vertical-align: baseline; "><div style="font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 21px; text-align: left; transform-origin: 384px 21px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 377.5px 8px; transform-origin: 377.5px 8px; unicode-bidi: normal; "><span style="">Given a sequence of rotation matrices Rotation_Matrix [3x3xN], and a sequence of 3D points [3x1xN], compute the [3xN] sequence in the rotated coordinates.</span></span></div></div></div>

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Solution Stats

46 Solutions
1 Solvers

Last Solution submitted on Jan 27, 2023

Last 200 Solutions

Problem Comments

4 Comments

4 Comments

Show 1 older comment

Rafael S.T. Vieira on 24 Oct 2020

Please, do not use isequal with floats, prefer instead abs(a-b) < tol. Notice how my solution used round and had to fix errors manually despite the operation being correct.

cokakola on 12 Nov 2022

The assert cannot be used in the way, it is used in the testsuit.
The error raised is not because of a wrong result but because of a wrong use of assert()

Christian Schröder on 21 Nov 2022

Could someone be so kind and please fix the test suite?

Augusto Mazzei on 27 Jan 2023 at 23:02

Pls fix your test suite. you shouldn't use -assert- for a matrix.

Solution Comments

Solution 3111146

1 Comment

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

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