Variability Plot

Click the More options button in the Plot: Variability plot options pane of the Graph Options dialog to display the Variability Plot dialog. Use this dialog to further customize the manner in which the individual elements of the icons that make up the box and whisker plots are computed.

Jitter. Use the options in this group box to jitter the data points, i.e., modify the original position of the data point from the center of the graph in order to more easily identify/brush overlapping points.

Off. If you select Off, no jitter is applied to the raw data points, outliers, and extremes.

Sequential. If you select Sequential, the jitter is applied sequentially to the raw data points, outliers, and extremes. The jitter is applied such that the first case in the data set is maximally shifted to the left and the last case is shifted maximally to the right.

Random. If you select Random, the data point is randomly shifted within the available range.  

Width. With this option, you can specify the maximum jitter width defined as percentage of box width. Possible percentages range from 0 to 250.

Outliers/extremes. Use the options here to specify the coefficient for determining outliers/extremes.

Coefficient. If you have created a variability plot using the type Box plot outliers/extremes (see Variability Plot - Quick tab), you can specify a coefficient in the Coefficient edit field to be used to determine the outlier or extreme value range; see Outliers and Extremes for additional details.

Width: Box, Whisker. The options under Width are used to determine the widths of the Box(s) and Whisker(s) in the plot, relative to the scaling (step size) for the horizontal axis, i.e., the axis along which multiple box/whiskers for multiple groups or variables are plotted. If you specify 100% as the width in either the Box or Whisker field, then the respective graph component will be as wide as single "step" along the horizontal x-axis; so if multiple boxes and whiskers are plotted, they most likely will run into each other. Thus, specify (typically) less than 100%.