Setting a hard minimum axis value in Google Charts API

I'm trying to build a Google Chart to show some uptime and downtime percentages, stacked. This works great except for one small thing - I'd like the baseline of the chart to be at 99.8, and the maximum to be 100 - since downtimes are usually less than .2, this will make the chart readable.

This seemed simple enough to me. I figured this would work:

var data = new google.visualization.DataTable();
data.addColumn('string', 'Date');
data.addColumn('number', 'Uptime');
data.addColumn('number', 'Downtime');
data.addRows([
  ['Dec 1, 1830',   99.875, 0.125],
  ['Dec 8, 1830',   99.675, 0.325],
  ['Dec 15, 1830',  99.975, 0.025],
  ['Dec 22, 1830',  100.0,  0.0]
]);

var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
chart.draw(data, {width: 400, height: 240, isStacked: true, vAxis: { title: "Percentage Uptime", minValue: 99.8, maxValue: 100}});

Unfortunately, the chart utterly disregards the minValue on the vAxis. This seems to be expected behaviour, according to the API, but this leaves the question - how would I accomplish this? I even went so far as to transform the data - ie, to subtract 99.8 from all the uptime values, and just have the chart go from 0 to .2, and this spits out a graph that looks okay, but I can't apply labels to the vertical axis that would say 99.8, 99.85, 99.9, whatever - the axis says, quite dutifully, 0 at the bottom, and .2 at the top, and th开发者_如何学运维ere seems to be no way to fix it this directions, either. Either solution would be acceptable, I'm sure there's SOME way to make this work?

---

you need to set viewWindow like this:

var data = new google.visualization.DataTable();
data.addColumn('string', 'Date');
data.addColumn('number', 'Uptime');
data.addColumn('number', 'Downtime');
data.addRows([
 ['Dec 1, 1830',   99.875, 0.125],
  ['Dec 8, 1830',   99.675, 0.325],
  ['Dec 15, 1830',  99.975, 0.025],
  ['Dec 22, 1830',  100.0,  0.0]

]);

var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
chart.draw(data,
           {width: 400, 
            height: 240, 
            isStacked: true,
            vAxis: { 
              title: "Percentage Uptime", 
              viewWindowMode:'explicit',
              viewWindow:{
                max:100,
                min:99.8
              }
            }
            }                 
          );

//edited for newer version of api

---

I had a similar problem and had to specify the property as "min" not "minValue"

vAxis: { 
    viewWindowMode:'explicit',
    viewWindow: {
        max:100,
        min:99.8
    }
}