Use the swap function to exchange the X- and Y-values of a previously saved X–Y data object (a collection of ordered pairs) to produce a new X–Y data object. The new X–Y data object has as its X-coordinate values the Y-coordinate values of the original X–Y data object and has as its Y-coordinate values the X-coordinate values of the original data object.
Figure 29–32 illustrates the type of X–Y plot that can be produced by using the swap function.
To swap the order of an X–Y data object:
Locate the Operate on XY Data dialog box.
From the main menu bar, select Tools
XY DataCreate. Click Operate on XY data in the dialog box that appears; then click Continue. The Operate on XY Data dialog box appears.
From the Operators listed, click swap(X).
The swap function appears in the expression window.
From the XY Data choices, click the name of the X–Y data object on which to operate and click Add to Expression. You can choose from all X–Y data objects previously saved within this session (listed alphabetically in the XY Data field).
The X–Y data object name appears within the swap function parentheses in the expression window.
To continue to build your expression, position the cursor in the expression window and type in or select the functions, operators, and X–Y data you want to include.
To evaluate and display your expression, click Plot Expression.
To save your new X–Y data object, click Save As and then provide a name in the dialog box that appears.
Saving your data object makes it available for future operations within this session and for inclusion in X–Y plots containing multiple data objects.
When you are finished, click Cancel to close the dialog box.
