Defining and modifying a specification

In general, the user can choose the parameters of the seasonal adjustment process by creating a specification with given settings or by changing some settings in the specification currently in use.

  1. To create a new specification go to the Workspace window and choose a node, to which you wish to add a specification (Modelling or Seasonal adjustment). Then choose a method (tramo or regarima for Modelling, tramoseats or x13 for Seasonal adjustment). Click on the left mouse button and choose a New option. The user can also import the specification from the external file with the Import from option.

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    Creating a new specification

  2. Next, unfold the node (the tramoseats node in the case presented here) and right click on the newly created specification (TramoSeatsSpec-1 in the case presented below) to open the local menu. The local menu offers the following options:

    • Open – displays the specification’s settings

    • Export to – enables the user to save the specification in a config file.

    • Delete – removes the specification from the workspace.

    • Rename – enables the user to change the name of the user-defined specification.

    • Edit comments – a functionality for monitoring how a seasonal adjustment process is implemented. The user can add and modify short notes concerning a given time series. These notes are visible in the Comments column in the Processing window. The notes are displayed when the user hovers the mouse on the given cell.

    • Create document – adds a new document to the relevant place in the Seasonal adjustment → documents section and assigns the specification selected by the user to it.

    • Clone – creates the copy of the specification and adds it to the list.

    Chose Open from the menu.

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    Opening a new specification

  3. The Specification window is divided into several sections. The actual content depends on the choice made by the user in step 1 of this scenario. To introduce changes unfold the sections, modify the current settings (choose from the list or insert the value by hand) and confirm the changes with the OK button.

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    Modifying a new specification

  4. User-defined specifications are usually used for seasonal adjustment of many time series (Statistical methods → Seasonal adjustment → Multi Processing → New). The user can also make changes to the specification after the modelling/seasonal adjustment process. In such a case, to introduce changes click on the Specification button. JDemetra+ opens the Specifications panel on the right. Unfold the sections, modify the current settings (choose from the list or type a new value) and confirm the changes with the Apply button. JDemetra+ automatically applies the new settings and displays the outcome resulting from the modified specification.

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    Modifying a specification, which is currently in use