Hi, out of aimless curiosity, I wanted to run subj. (on some spam filtering results), and since Google pointed me to the example in ROOT, I've installed it (version 3.03/05) and now I'm trying to wrap my head around it... When I run the example (principal.C), everything seems to work fine until I get a ROOT Object Browser window with the Covariance Matrix, Eigenvalue vector, Eigenvector Matrix, Mean value vector, Sigma value vector and pca_e objects. I can double-click pca_e and get a graph of eigenvalues - but when I double-click any other object (I'm especially interested in the eigenvector matrix), nothing happens... The Eigenvector Matrix has a local menu, but no item in it shows the matrix as a matrix - it either shows summary information (the Inspect command), or asks for some option (the DrawClone command). I get a feeling that I'm not using ROOT as intended - but is it really so unreasonable to consider the eigenvectors being a part of the result of PCA? How do I get to see them? Bye Vasek
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