Stair series objects are created by the stair function. Each
hggroup element of the series contains a single line object as a
child representing the stair. The properties of the stair series are
colorThe RGB color or color name of the line objects of the stairs. See Colors.
linewidthlinestyleThe line width and style of the line objects of the stairs. See Line Styles.
markermarkeredgecolormarkerfacecolormarkersizeThe line and fill color of the markers on the stairs. See Colors.
xdataydataThe original x and y data of the stairs.
xdatasourceydatasourceData source variables.