Plot Node Tab

Plots show values of a Y field against values of an X field. Often, these fields correspond to a dependent variable and an independent variable, respectively.

X field. From the list, select the field to display on the horizontal x axis.

Y field. From the list, select the field to display on the vertical y axis.

Z field. When you click the 3-D chart button, you can then choose a field from the list to display on the z axis.

Overlay. There are several ways to illustrate categories for data values. For example, you can use maincrop as a color overlay to indicate the estincome and claimvalue values for the main crop grown by claim applicants. See the topic Aesthetics, Overlays, Panels, and Animation for more information.

Overlay type. Specifies whether an overlay function or smoother is displayed. The smoother and overlay functions are always calculated as a function of y.

• None. No overlay is displayed.
• Smoother. Displays a smoothed fit line computed using locally weighted iterative robust least squares regression (LOESS). This method effectively computes a series of regressions, each focused on a small area within the plot. This produces a series of "local" regression lines that are then joined to create a smooth curve.

  

• Function. Select to specify a known function to compare to actual values. For example, to compare actual versus predicted values, you can plot the function y = x as an overlay. Specify a function for y = in the text box. The default function is y = x, but you can specify any sort of function, such as a quadratic function or an arbitrary expression, in terms of x.

  Note: Overlay functions are not available for a panel or animation graph.

Once you have set options for a plot, you can run the plot directly from the dialog box by clicking Run. You may, however, want to use the Options tab for additional specifications, such as binning, X Mode, and style.