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Cross-Validation in R with crossval

Thierry Moudiki shows off some functionality in the the crossval package:

In this post, I present some examples of use of crossval on a linear model, and on the popular xgboost and randomForest models. The error measure used is Root Mean Squared Error (RMSE), and is currently the only choice implemented.

Click through for the demonstration in notebook form. H/T R-Bloggers.