To define an HDMR model, follow the procedure below:
* click the '''Add''' button in the "HDMR Models" section of the dialog to open up the '''Add HDMR Model Dialog'''. At the bottom of this dialog, you can see a list of all the available [[EM.Cube]] standard output [[parameters]]. This list may vary depending on the types of sources and observables you have defined in your project. * Choose a name for your HDMR model. Make sure that this name is unique and does not conflict with the existing data file names in your project's folder.
* Type in any mathematical expressions in the boxes labeled '''Expression'''. If you select the name of any standard parameter in the table and double-click on it, it will be reflected in the expression box.
* Select one of the available options in the dropdown list labeled '''Logical Operator'''. The default operator is '''"== (Equal To)"'''.