Subtree kernel may not be positive definite

ArtPoon / kamphir

Phylogenetic inference using a tree-shape kernel in an Approximate Bayesian Computation framework

BSD 3-Clause "New" or "Revised" License

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Subtree kernel may not be positive definite #50

Open rmcclosk opened 9 years ago

rmcclosk commented 9 years ago

I noticed when making kernel matrices that when sigma < 1, the matrix is no longer positive semi-definite. Possibly an error in my code though, currently investigating.