// add calculation for senators
vt.addColumn("Senate", "District <= 0");
vis.setRendererFactory(new RendererFactory() {
AbstractShapeRenderer sr = new ShapeRenderer();
Renderer arY = new AxisRenderer(Constants.RIGHT, Constants.TOP);
Renderer arX = new AxisRenderer(Constants.CENTER, Constants.FAR_BOTTOM);
public Renderer getRenderer(VisualItem item) {
return item.isInGroup("ylab") ? arY :
item.isInGroup("xlab") ? arX : sr;
}