|Fundamentals of Statistics contains material of various lectures and courses of H. Lohninger on statistics, data analysis and chemometrics......click here for more.|
|See also: forecasting|
Time Series - Trends
When measuring the temperature twice a day, the resulting time series may be as follows:
After averaging out the daily cycles, which are caused by measuring twice a day, the following time series is obtained:
Finally, removing both the trend and the cycles results in the following series:
Now, it is time to check the properties of the resulting time series.
If it is actually stationary, it provides the basis for setting up a model.
In order to forecast future values, the result obtained by using the model
has to be transformed so that the trend and the daily cycle are again taken
Last Update: 2012-10-08