If RFclass is an output object created by the randomForest command, typing plot(RFclass) will generate an error rate plot. What is this plot used for?
A) Used to determine the needed size of minbucket
B) Used to determine the needed size of mtry
C) Used to determine the needed size of ntree
D) None of the above

Question

Quizplus · Accepted Answer

The error rate plot generated by plot(RFclass) is used to determine the needed size of ntree, which is the number of trees grown in the forest. The plot shows the error rate (proportion of misclassified observations) as a function of the number of trees grown. The plot can be used to determine the point at which adding more trees is unlikely to improve the performance of the model, and where overfitting might occur. Therefore, it is an important tool for selecting an appropriate value for ntree, which is a hyperparameter that can significantly impact the performance of the random forest model.

If RFclass Is an Output Object Created by the RandomForest