Floating Bar Chart
As you can see, the bars (also columns) in our charts can start and end at any place, not necessary from axis or zero-coordinate. All you need to do is set openField for column graph and set the open values in data. For a floating-columns check Waterfall chart demo.
Demo source
<!-- Styles -->
<style>
#chartdiv {
width : 100%;
height : 500px;
}
</style>
<!-- Resources -->
<script src="https://www.amcharts.com/lib/3/amcharts.js"></script>
<script src="https://www.amcharts.com/lib/3/serial.js"></script>
<script src="https://www.amcharts.com/lib/3/plugins/export/export.min.js"></script>
<link rel="stylesheet" href="https://www.amcharts.com/lib/3/plugins/export/export.css" type="text/css" media="all" />
<!-- Chart code -->
<script>
var chart = AmCharts.makeChart("chartdiv", {
"theme": "none",
"type": "serial",
"dataProvider": [{
"name": "John",
"startTime": 8,
"endTime": 11,
"color": "#FF0F00"
}, {
"name": "Joe",
"startTime": 10,
"endTime": 13,
"color": "#FF9E01"
}, {
"name": "Susan",
"startTime": 11,
"endTime": 18,
"color": "#F8FF01"
}, {
"name": "Eaton",
"startTime": 15,
"endTime": 19,
"color": "#04D215"
}],
"valueAxes": [{
"axisAlpha": 0,
"gridAlpha": 0.1
}],
"startDuration": 1,
"graphs": [{
"balloonText": "<b>[[category]]</b><br>starts at [[startTime]]<br>ends at [[endTime]]",
"colorField": "color",
"fillAlphas": 0.8,
"lineAlpha": 0,
"openField": "startTime",
"type": "column",
"valueField": "endTime"
}],
"rotate": true,
"columnWidth": 1,
"categoryField": "name",
"categoryAxis": {
"gridPosition": "start",
"axisAlpha": 0,
"gridAlpha": 0.1,
"position": "left"
},
"export": {
"enabled": true
}
});
</script>
<!-- HTML -->
<div id="chartdiv"></div> 