TrainSignManage/WebFrame/bower_components/chart.js/docs/01-Line-Chart.md

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---
title: Line Chart
anchor: line-chart
---
###Introduction
A line chart is a way of plotting data points on a line.

Often, it is used to show trend data, and the comparison of two data sets.

<div class="canvas-holder">
	<canvas width="250" height="125"></canvas>
</div>

###Example usage
```javascript
var myLineChart = new Chart(ctx).Line(data, options);
```
###Data structure

```javascript
var data = {
	labels: ["January", "February", "March", "April", "May", "June", "July"],
	datasets: [
		{
			label: "My First dataset",
			fillColor: "rgba(220,220,220,0.2)",
			strokeColor: "rgba(220,220,220,1)",
			pointColor: "rgba(220,220,220,1)",
			pointStrokeColor: "#fff",
			pointHighlightFill: "#fff",
			pointHighlightStroke: "rgba(220,220,220,1)",
			data: [65, 59, 80, 81, 56, 55, 40]
		},
		{
			label: "My Second dataset",
			fillColor: "rgba(151,187,205,0.2)",
			strokeColor: "rgba(151,187,205,1)",
			pointColor: "rgba(151,187,205,1)",
			pointStrokeColor: "#fff",
			pointHighlightFill: "#fff",
			pointHighlightStroke: "rgba(151,187,205,1)",
			data: [28, 48, 40, 19, 86, 27, 90]
		}
	]
};
```

The line chart requires an array of labels for each of the data points. This is shown on the X axis.
The data for line charts is broken up into an array of datasets. Each dataset has a colour for the fill, a colour for the line and colours for the points and strokes of the points. These colours are strings just like CSS. You can use RGBA, RGB, HEX or HSL notation.

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 Line 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 grid lines are shown across the chart