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For on-topic questions involving the mathematical concept projection, a linear transformation $P$ such that $P=P^2$. Please include also a more statistical methods tag. For purely mathematical questions about projections it is better to ask on math SE https://math.stackexchange.com/

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So how can I project the data with the eigenvectors from LDA?

I'm late here, but this link may be helpful to you if you're still exploring this. Modified from Alexander Jamieson's answer there: Mdl = fitcdiscr(X,y) [W, LAMBDA] = eig(Mdl.BetweenSigma, Mdl.Sigma) …
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