I spent airport time yesterday and morning time today making human-readable output from my exoplanet discovery code. I realized that by far the best way to see that the MCMC has converged is to show that there are no correlations between any parameter and the link number. I confirm this visually, but this could be tracked quantitatively; a great upgrade for the next generation of code. I also thought—and spoke with Roweis—about model selection, which everyone treats as trivial, but certainly is not.
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