Drawing an ellipse

var graphinstance = new Graph( domGraph );

graphinstance.getXAxis().forceMin( 0 );
graphinstance.getXAxis().forceMax( 50 );

graphinstance.getYAxis().forceMin( 0 );
graphinstance.getYAxis().forceMax( 50 );

graphinstance.updateAxes();

var shape = graphinstance.newShape( {
  type: 'ellipse',
  pos: {
    x: 10,
    y: 10
  },
  fillColor: 'rgba(200, 100, 100, 0.5)',

  locked: true,
  selectable: false

} ).draw();

shape.setR( '50px', '20px' );

shape.addTransform( 'translate', [ 20, 0 ] )
shape.addTransform( 'rotate', [ 20 ] )

graphinstance.redraw();
graphinstance.drawSeries();