How to calculate a 2D rotation vector with PCA?
5 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi all. I have two dataset (n x 2 matrix) in 2D space and I know their PCA matrices. PCA1 = [0.9981 -0.0622; 0.0622 0.9981], PCA2 = [0.5617 0.8273; 0.8273 -0.5617]
And I want to rotate one of these dataset and make them to be registered. How can I get a rotation vector?
Antworten (1)
Alfonso Nieto-Castanon
am 23 Mai 2015
Bearbeitet: Alfonso Nieto-Castanon
am 23 Mai 2015
find the angle between the first column of PCA1 and the first column of PCA2 (hint: cos(angle(a,b))*norm(a)*norm(b)=a'*b) and build your rotation matrix from that (e.g. [cos(ang) sin(ang); -sin(ang) cos(ang)])
0 Kommentare
Siehe auch
Kategorien
Mehr zu Dimensionality Reduction and Feature Extraction finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!