applidium
What's meaning about (aX aY)
aX = cov(x_,y_) aY = 0.5/n * ( ∑(x_^2) + ∑(y_^2) + sqrt( (∑(x_^2) + ∑(y_^2))^2 + 4 * cov(x_,y_)^2 ) )
What's meaning about (aX aY) Look like The PCA is not say the principal vector is (aX aY)
Hello sunjmmeishao,
I'm sorry I don't quite catch your meaning. Could you try and reformulate your question ? Also, I have to say that I'm not the one behind the math of the PCA applied in this project, @PatrickNLT is. So I might not be able to help anyway.
Regards
Hello Nooba, It is nothing.I am a beginner,so have many question.
I expect the split partition is a rectangle， but the principal vector is an oblique line. thanks!
Hi @sunjmmeishao ,
Being able to split using an oblique line is an important feature of ADClusterMapView. It makes it a valuable alternative to traditional clustering libraries that often use a quad tree. If you want to learn more about the algorithm, you can have a look at the blog post describing the approach we used back then: https://applidium.com/en/news/too_many_pins_on_your_map/
