chart
v0.1.2
Published
event based time series charting API
Downloads
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Readme
node-chart
Time Series Charting Canvas API
Use
var chart = new Chart();
var ee = require('events').EventEmitter;
var datasource = new ee;
chart.series(datasource);
chart.to(document.getElementById('mychart'));
setInterval(function() {
var random = Math.floor(Math.random()*100);
datasource.emit('data',{y:random});
},1000);
Multiple Data sources
var d1 = new ee;
var d2 = new ee;
chart.series(d1);
chart.series(d2);
// or
chart.series([d1,d2])
// or
chart.series(d1,d2);
chart.series
Event types that chart.series responds to are
'data' - provides data for timeseries and optional labels
'stop' - stops the timeseries for that datastream
chart.legend
<canvas id='legend'></canvas>
chart.legend(document.getElementById('legend'));
Legend is automatically created with the data that is sent. To visualize and interact with a legend, use the .legend callback
Labels go with the value
datasorce.emit('data',{'units sold':9.2})
You can supply multiple labels
datasorce1.emit('data',{'units sold':9.2})
datasorce2.emit('data',{'current energy consumption':30})
Tests
// to install tap, simply npm install tap
tap ./test
MISC
Author: David Wee [email protected] License: MIT Developed At : Malhar, Inc. [email protected]