Define/Custom Field Functions... menu item opens the
Custom Field Function Calculator dialog box.
Custom Field Function Calculator Dialog Box
Custom Field Function Calculator dialog box allows you to define custom field functions based on existing functions, using simple calculator operators. Any functions that you define will be added to the list of default flow variables and other field functions provided by
Recall that you must enter all constants in the function definition in SI units.
31.5.1 for details about the items below.
displays the function that you are currently defining. As you select each item from the
Field Functions list or the calculator keypad, it will appear in the
Definition text entry box. You
cannot edit the contents of this box directly; if you want to delete part of a function, use the
Delete button on the keypad.
are push buttons that perform calculator operations. When you select a calculator button (by clicking on it), the appropriate symbol will appear in the
Definition text entry box.
Select Operand Field Functions from
contains the available field functions and the means for selecting them.
contains a list from which you can select a variable to be used in the definition of a new function.
enters the variable that is currently selected in the
Field Functions list in the
New Function Name
specifies the name of the function you are defining. Should you decide to change the function name after you have defined the function, you can do so in the
Field Function Definitions dialog box, which you can open by clicking on the
Manage... push button.
creates the function and adds it to the list of
Custom Field Functions within the drop-down list of available field functions. The
Define push button is grayed out after you create a new function or if the
Definition field is empty.