Show only two axis values in highcharts - highcharts

Question

I would like to show just the 2GB and the 4GB values (just 2 values) in the y-axis of this chart (see jsFiddle):
$(function () {
$('#container').highcharts({
chart: {
type: 'bar'
},
title: {
text: 'Stacked bar chart'
},
xAxis: {
categories: ['Size']
},
yAxis: {
min: 0,
max: 4294967296,
labels: {
formatter: function() {
var maxElement = this.axis.max;
var kb = 1024, mb = 1048576, gb = 1073741824;
if (maxElement > gb) {
return (this.value / gb).toFixed(1) + " GB";
} else if (maxElement > mb) {
return (this.value / mb).toFixed(1) + " MB";
} else if (maxElement > kb) {
return (this.value / kb).toFixed(1) + " KB";
} else {
return (this.value) + " B";
}
}
},
title: {
text: ''
}
},
tooltip: {
formatter: function() {
return '<b>' + this.series.name + '</b><br/>' + this.x + ': ' + filesize(this.y);
}
},
legend: {
reversed: false
},
plotOptions: {
series: {
stacking: 'normal'
}
},
series: [{
name: 'Versioned trees',
data: [94371840]
}, {
name: 'Metadata',
data: [115343360]
}, {
name: 'Data',
data: [1395864371.2]
}]
});
});
Is it possible?

Answer 1

You can use the tickPositions property, like this:
tickPositions:[0, 1073741824 * 2, 1073741824 * 4]
It doesn't appear to respect the min:0 if you don't include 0, but you can hide the 0 label by adding:
showFirstLabel: false
Updated Fiddle:
http://jsfiddle.net/jlbriggs/kv684von/2/
Reference:
http://api.highcharts.com/highcharts#yAxis.tickPositions