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From Sean Owen <>
Subject Re: RMSE in MovieLensALS increases or stays stable as iterations increase.
Date Thu, 27 Nov 2014 08:12:40 GMT
Ah of course. Great explanation. So I suppose you should see desired
results with lambda = 0, although you don't generally want to set this
to 0.

On Wed, Nov 26, 2014 at 7:53 PM, Xiangrui Meng <> wrote:
> The training RMSE may increase due to regularization. Squared loss
> only represents part of the global loss. If you watch the sum of the
> squared loss and the regularization, it should be non-increasing.

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