This option lets the user aggregate the time series data to another coarse time series resolution. For example, daily to monthly.
Open another daily time series data file. Click on the Aggregate data function and the following dialogue box will open.
Depending on the current aggregation of the data different functions will be available to you. In the case above daily data is open therefore monthly, seasonal and yearly aggregation can be done. If you opened monthly, only seasonaland yearly aggregation could be conducted i.e. you cannot disaggregate data.
Find some daily time series data by clicking on the map and go through the process of aggregation and graphing to familiarise yourself with the function and associated outputs in tabular form.