Annotations in bar series type not appearing

[Jan]

If you look at the code below and switch the seriesType value from bars and lines, you'll notice that the annotations appear when it's a line, but not when it's a bar. 

 

function drawVisualization() {

  var data = new google.visualization.DataTable();

  data.addColumn('string', 'Quarter'); // Implicit domain column.
  data.addColumn('number', 'Sales'); // Implicit data column.
  data.addColumn({type:'string', role:'annotation'});
  data.addRows([
    ['q1',  165,      'A'],
    ['q2',  135,      'B'],
    ['q3',  157,      'C'],
    ['q4',  139,      'D'],
  ]);
  // Create and draw the visualization.
  var ac = new google.visualization.ComboChart(document.getElementById('visualization'));
  ac.draw(data, {
    title : 'Monthly Coffee Production by Country',
    width: 600,
    height: 400,
    seriesType: "bars"
  });
}
​ 

[asgallant]

Annotations are not supported for BarCharts, ColumnCharts, or bar series on ComboCharts.