What's the Caret?

[WeiFoo]

Wei: Caret is nothing but grid search!

here's the description of train function, which is method the paper authors used.

''' train can be used to tune models by picking the complexity parameters that are associated with the optimal resampling statistics. For particular model, a grid of parameters (if any) is created and the model is trained on slightly different data for each candidate combination of tuning parameters. Across each data set, the performance of held-out samples is calculated and the mean and stan- dard deviation is summarized for each combination. The combination with the optimal resampling statistic is chosen as the final model and the entire training set is used to fit a final model.

'''

more details can be found here:link

[WeiFoo]

references talking about grid search :

• A Hybrid Approach to Expert and Model Based Effort Estimation
• Random Search for Hyper-Parameter Optimization