What Is tuneLength R

tuneLength = It allows system to tune algorithm automatically. It indicates the number of different values to try for each tunning parameter. For example, mtry for randomForest.

What is tuneLength in Knn?

# The tuneLength parameter tells the algorithm to try different default values for the main parameter set.seed(123) my_knn_model <- train(Species ~ ., method = “knn”, data = trainSet, tuneLength = 4) # In this case we used 4 default values my_knn_model.

What is tune grid?

tune_grid.Rd. tune_grid() computes a set of performance metrics (e.g. accuracy or RMSE) for a pre-defined set of tuning parameters that correspond to a model or recipe across one or more resamples of the data.