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----
-title: Bar Chart
-anchor: bar-chart
----
-
-### Introduction
-A bar chart is a way of showing data as bars.
-
-It is sometimes used to show trend data, and the comparison of multiple data sets side by side.
-
-<div class="canvas-holder">
-	<canvas width="250" height="125"></canvas>
-</div>
-
-### Example usage
-```javascript
-var myBarChart = new Chart(ctx).Bar(data, options);
-```
-
-### Data structure
-
-```javascript
-var data = {
-	labels: ["January", "February", "March", "April", "May", "June", "July"],
-	datasets: [
-		{
-			label: "My First dataset",
-			fillColor: "rgba(220,220,220,0.5)",
-			strokeColor: "rgba(220,220,220,0.8)",
-			highlightFill: "rgba(220,220,220,0.75)",
-			highlightStroke: "rgba(220,220,220,1)",
-			data: [65, 59, 80, 81, 56, 55, 40]
-		},
-		{
-			label: "My Second dataset",
-			fillColor: "rgba(151,187,205,0.5)",
-			strokeColor: "rgba(151,187,205,0.8)",
-			highlightFill: "rgba(151,187,205,0.75)",
-			highlightStroke: "rgba(151,187,205,1)",
-			data: [28, 48, 40, 19, 86, 27, 90]
-		}
-	]
-};
-```
-The bar chart has the a very similar data structure to the line chart, and has an array of datasets, each with colours and an array of data. Again, colours are in CSS format.
-We have an array of labels too for display. In the example, we are showing the same data as the previous line chart example.
-
-The label key on each dataset is optional, and can be used when generating a scale for the chart.
-
-### Chart Options
-
-These are the customisation options specific to Bar charts. These options are merged with the [global chart configuration options](#getting-started-global-chart-configuration), and form the options of the chart.
-
-```javascript
-{
-	//Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value
-	scaleBeginAtZero : true,
-
-	//Boolean - Whether grid lines are shown across the chart
-	scaleShowGridLines : true,
-
-	//String - Colour of the grid lines
-	scaleGridLineColor : "rgba(0,0,0,.05)",
-
-	//Number - Width of the grid lines
-	scaleGridLineWidth : 1,
-
-	//Boolean - Whether to show horizontal lines (except X axis)
-	scaleShowHorizontalLines: true,
-
-	//Boolean - Whether to show vertical lines (except Y axis)
-	scaleShowVerticalLines: true,
-
-	//Boolean - If there is a stroke on each bar
-	barShowStroke : true,
-
-	//Number - Pixel width of the bar stroke
-	barStrokeWidth : 2,
-
-	//Number - Spacing between each of the X value sets
-	barValueSpacing : 5,
-
-	//Number - Spacing between data sets within X values
-	barDatasetSpacing : 1,
-	{% raw %}
-	//String - A legend template
-	legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].fillColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"
-	{% endraw %}
-}
-```
-
-You can override these for your `Chart` instance by passing a second argument into the `Bar` method as an object with the keys you want to override.
-
-For example, we could have a bar chart without a stroke on each bar by doing the following:
-
-```javascript
-new Chart(ctx).Bar(data, {
-	barShowStroke: false
-});
-// This will create a chart with all of the default options, merged from the global config,
-//  and the Bar chart defaults but this particular instance will have `barShowStroke` set to false.
-```
-
-We can also change these defaults values for each Bar type that is created, this object is available at `Chart.defaults.Bar`.
-
-### Prototype methods
-
-#### .getBarsAtEvent( event )
-
-Calling `getBarsAtEvent(event)` on your Chart instance passing an argument of an event, or jQuery event, will return the bar elements that are at that the same position of that event.
-
-```javascript
-canvas.onclick = function(evt){
-	var activeBars = myBarChart.getBarsAtEvent(evt);
-	// => activeBars is an array of bars on the canvas that are at the same position as the click event.
-};
-```
-
-This functionality may be useful for implementing DOM based tooltips, or triggering custom behaviour in your application.
-
-#### .update( )
-
-Calling `update()` on your Chart instance will re-render the chart with any updated values, allowing you to edit the value of multiple existing points, then render those in one animated render loop.
-
-```javascript
-myBarChart.datasets[0].bars[2].value = 50;
-// Would update the first dataset's value of 'March' to be 50
-myBarChart.update();
-// Calling update now animates the position of March from 90 to 50.
-```
-
-#### .addData( valuesArray, label )
-
-Calling `addData(valuesArray, label)` on your Chart instance passing an array of values for each dataset, along with a label for those bars.
-
-```javascript
-// The values array passed into addData should be one for each dataset in the chart
-myBarChart.addData([40, 60], "August");
-// The new data will now animate at the end of the chart.
-```
-
-#### .removeData( )
-
-Calling `removeData()` on your Chart instance will remove the first value for all datasets on the chart.
-
-```javascript
-myBarChart.removeData();
-// The chart will now animate and remove the first bar
-```