h2o.rmsle: Retrieve the Root Mean Squared Log Error
Description
Retrieves the root mean squared log error (RMSLE) value from an H2O model.
If "train", "valid", and "xval" parameters are FALSE (default), then the training rmsle value is returned. If more
than one parameter is set to TRUE, then a named vector of rmsles are returned, where the names are "train", "valid"
or "xval".