scikit-learn/scikit-learn — pull request #2489 by samuela (2013-10-04 21:55:42+00:00)
Title: Fix typo in the Gaussian PDF in Naive Bayes docs

Hopefully, this same issue doesn't exist in the code.

I would also feel more comfortable if mu_y and sigma_y were mu_iy and sigma_iy, respectively, seeing as there are separate distributions per feature, per class.