Function of Coordinates
Use this option to apply a prescribed temperature that is a function of the current coordinate system (WCS or UCS). Alternatively, you can create a coordinate system whose X axis is aligned with the entity over which you are placing the spatially varying temperature. You can select one or more entities on which to apply this prescribed temperature.
When you select Function Of Coordinates, the button and option menu appear on the dialog box. Click . The Functions dialog box opens. You can use this form to create, copy, edit, or delete a function.