When performing a cross-validation of regression model with R, in the forecast package, we use the _____ function to find the number of observations in the validation set.
A) length
B) forecast
C) tslm
D) accuracy

Question

Quizplus · Accepted Answer

The `length` function in R is used to find the number of observations in a vector, list, or other R object, which can include the number of observations in a validation set. The other options are specific to forecasting and model accuracy, not for counting observations.

When Performing a Cross-Validation of Regression Model with R, in the Forecast