Scatter series objects are created by the
functions. A single hggroup element contains as many children as there are
points in the scatter plot, with each child representing one of the points.
The properties of the stem series are
The line width of the line objects of the points. See Line Styles.
The line and fill color of the markers of the points. See Colors.
The original x, y and z data of the stems.
The color data for the points of the plot. Each point can have a separate color, or a unique color can be specified.
The size data for the points of the plot. Each point can its own size or a unique size can be specified.
Data source variables.