@subsubheading Description

A time series object containing average air temperatures at
Nottingham Castle in degrees Fahrenheit for 20 years.

@subsubheading Format

@table @code
@item record
Index of the record.
@item lead
Leading indicator.
@item sales
Sales volume.
@end table

@subsubheading Source

Anderson, O. D. (1976). @cite{Time Series Analysis and Forecasting:
The Box-Jenkins approach}. London: Butterworths. Series R.

@subsubheading Examples

@example
@INCLUDE_DATASET_EXAMPLE_SCRIPT{BJsales_1.m}
@end example
