title: How to round predictions
body: <p>When I use cross-validation in sklearn, it returns me an RMSE value. The RMSE value is calculated by the root mean square of the predicted y value(for example, 7.11) - the real y value( for example, 6). I want to calculate RMSE by using the root mean square of the rounded predicted y value(for example, round(7.11) = 7) - the real y value(for example, 6). How do I do this? I use python. Thank you.</p>