Just going over the scikit GaussianProcess code and comparing the results with a simple 1D example using Rasmussen as a reference. Results are not matching and I traced the source to the mean equation in scikit. Scikit states the mean eqn to be:
y_mean = f(X)^T beta + r(X)^T gamma but as far as I can see from Rasmussen (eqn 2.41 and 2.42) this should be (in scikit notation): y_mean = -u(X)^T beta + r(X)^T gamma Everything else seems to match. Am I missing something here? Z
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