Time Plot Tab

Plot. Provides a choice of how to plot time series data.

• Selected series. Plots values for selected time series. If you select this option when plotting confidence intervals, deselect the Normalize check box.
• Selected Time Series models. Used in conjunction with a Time Series model, this option plots all the related fields (actual and predicted values, as well as confidence intervals) for one or more selected time series. This option disables some other options in the dialog box. This is the preferred option if plotting confidence intervals.

Series. Select one or more fields with time series data you want to plot. The data must be numeric.

X axis label. Choose either the default label or a single field to use as the label for the x axis in plots. If you choose Default, the system uses the TimeLabel field created from a Time Intervals node upstream (for streams created in SPSS® Modeler versions 17.1 and earlier), or sequential integers if there is no upstream Time Intervals node.

For more information, see Time Intervals Node (deprecated).

Display series in separate panels. Specifies whether each series is displayed in a separate panel. Alternatively, if you do not choose to panel, all time series are plotted on the same graph, and smoothers will not be available. When plotting all time series on the same graph, each series will be represented by a different color.

Normalize. Select to scale all Y values to the range 0–1 for display on the graph. Normalizing helps you explore the relationship between lines that might otherwise be obscured due to differences in the range of values for each series and is recommended when plotting multiple lines on the same graph, or when comparing plots in side-by-side panels. (Normalizing is not necessary when all data values fall within a similar range.)

Display. Select one or more elements to display in your plot. You can choose from lines, points, and (LOESS) smoothers. Smoothers are available only if you display the series in separate panels. By default, the line element is selected. Make sure you select at least one plot element before you run the graph node; otherwise, the system will return an error stating that you have selected nothing to plot.

Limit records. Select this option if you want to limit the number of records plotted. Specify the number of records, read from the beginning of your data file, that will be plotted in the Maximum number of records to plot option. By default this number is set to 2,000. If you want to plot the last n records in your data file, you can use a Sort node prior to this node to arrange the records in descending order by time.