Hi @yuyang,

Try this:

To derive the above fields, within the Data Item Browser (DIB), once the field is selected, you can click on "Parameters" on the right side, select "Series" then choose the desired parameters. In the following diagram, I can choose the subset field called 'fperiod' from the "Output" selection. Once selected, the final field formula is created (bottom right corner):

Within the above screenshot, the derived formula is for one field. However, given I have chosen multiple fields that have all the same timeseries parameters, the get_data() function has an optional 3rd parameter that is a simple name/value pair object that organizes the parameters that will be applied to all fields.