[visualization-api] Make the vAxis go from higher numbers to lower numbers

[Tiago Peres]

Hello! How can I make the vAxis go from 10 to 0? 

As you can see, it was not enough what I did here.




// Callback that draws the pie chart for No Hedge Fund's chart.
function draw0hedgeChart() {
  var data = new google.visualization.DataTable();
  data.addColumn('number', 'X');
  data.addColumn('number', 'Y');

    //here we enter the data
  data.addRows([
   [ 9.87,      6.53],
  ]);

    //variables such as title, axis, width and height of the scatterplot
    var options = {
        colors: ['#000000'],
        legend: 'none',
          title: 'Risk vs. Return with 0% Hedge Fund',
          hAxis: {title: 'Risk', minValue: 7, maxValue: 10, gridlineColor: 
'#fff'},
          vAxis: {title: 'Return', minValue: 10, maxValue: 0, 
gridlineColor: '#fff'},    /////////////////////////////////// Here is 
wherewant to make the axis navigate from the value 10, going to 0
          width:900,
          height:500
        };


  var container = document.getElementById('chart0_div'); //here we define 
the id of the element. This name is what we must use in a div to make the 
chart appear
  var chart = new google.visualization.ScatterChart(container);

  google.visualization.events.addListener(chart, 'ready', function () {
    var layout = chart.getChartLayoutInterface();
      
    for (var i = 0; i < data.getNumberOfRows(); i++) {
        
        var xPos = layout.getXLocation(data.getValue(i, 0));
        var yPos = layout.getYLocation(data.getValue(i, 1));

        var widget0 = container.appendChild(document.createElement('img'));
        widget0.src = 'img/0.png';
        widget0.className = 'chart0';

        // (overlay the dot)
        widget0.style.top = (yPos - 50) + 'px';
        widget0.style.left = (xPos - 50) + 'px';
      
    }
  });

  chart.draw(data, options);
}        

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