n3-charts.line-chart

A line chart implementation for AngularJS applications. It makes an extensive use of the wonderful D3.js library.

And here is the demo page.

How to install

• Copy line-chart.js and line-chart.css wherever you want
• Reference them in your index.html file
• Reference the module in your app file : angular.module('myApp', [ 'n3-charts.linechart' ])

How to use

A line chart is called using this syntax :

<linechart data="data" options="options"></linechart>

The line chart directives needs two attributes : data and options. If one is missing, nothing happens.

Data

Your data should look like this :

$scope.data = [
  {x: 0, value: 4, otherValue: 14},
  {x: 1, value: 8, otherValue: 1},
  {x: 2, value: 15, otherValue: 11},
  {x: 3, value: 16, otherValue: 147},
  {x: 4, value: 23, otherValue: 87},
  {x: 5, value: 42, otherValue: 45}
];

Note : only x is supported as an abscissas key.

Options

Options must be an object with a series array. It should look like this :

$scope.options = {
  axes: {
    x: {type: 'linear', tooltipFormatter: function(x) {return x;}}
  },
  series: [
    {y: 'value', color: 'steelblue', type: 'area', label: 'Pouet'},
    {y: 'otherValue', axis: 'y2', color: 'lightsteelblue'}
  ],
  lineMode: 'linear'
}

Axes

The axes keys can be undefined. Otherwise, it should contain an x̀ key with the following properties :

• type : optional, can be either 'date' or 'linear' (default is 'linear'). If set to 'date', the chart will expect Date objects as abscissas. No transformation is done by the chart itself, so the behavior is basically D3.js' time scale's.
• tooltipFormatter : optional, allows to format the tooltip. Must be a function that accepts a single arguments, the x value. It should return something that will be converted into a string and put in the x tooltip.

Note : only the x axis can be configured (but the other axes should be available soon...).

Series

The series key must be an array which contains objects with the following properties :

• y : mandatory, defines which property on each data row will be used as ordinate value.
• color : mandatory, any valid HTML color.
• label : optional, will be used in the legend (if not undefined, the y value will be used).
• axis : optional, can be either 'y' (default, for left) or 'y2' (for right). Defines which vertical axis should be used for this series. If no right axis is needed, none will be displayed.
• type : optional, can be one value between 'line', 'area', 'column'. Default is 'line'.

Optional stuff

Additionally, you can set lineMode to a value between these :

• linear (default)
• step-before
• step-after
• basis
• basis-open
• basis-closed
• bundle
• cardinal
• cardinal-open
• cadinal-closed
• monotone

For more information about interpolation, please consult the D3.js documentation about that.

Building

Fetch the repo :

$ git clone https://github.com/angular-d3/line-chart.git

Install stuff :

$ npm install

Install moar stuff :

$ bower install

Build : Install stuff :

$ grunt

Hack.

Testing

AngularJS is designed to be testable, and so is this project. It is 100% covered, and we want to keep it this way.