Edit Custom Function

Click the Edit button in the Function Name Manager (after selecting an existing 2D custom function) to display the Edit Custom Function dialog box.

Type

Use the Type drop-down box to select either a standard 2D Function (y=f(x)) or a Parametric curve. Note that the remainder of the dialog box will change depending on what is selected here.

Range of X; Range of Parameter t

If the specified Type is a standard 2D Function, then use the Range of X group box to specify the X range (i.e., Minimum and Maximum values) for the custom function. Note that additional options for controlling these ranges are available on the Graph Options dialog box - (2D) Custom Function tab. If the specified Type is Parametric curve, then specify here the Range of Parameter t (in a Parametric Curve function, the plot positions for each point on the plotted line on the horizontal x-axis and vertical y-axis is computed by evaluating the functions Y(t) and X(t) of parameter t).

Function guide

Select the Function guide check box to display a list of possible functions and related properties when you enter a custom function.

Function Y =; Y(t) = and X(t) =

If the specified Type is a standard 2D Function, then use the Y= box to type in the function you want to plot; if the specified Type is Parametric curve, then specify here the two functions Y(t) = and X(t) =. Note that if you have selected the Function guide check box, a menu with possible characters or functions will appear as you type.