JavaScript Graphics
Google Chart
From simple line charts to complex hierarchical tree maps, the Google Chart gallery provides a large number of ready-to-use chart types:
- Scatter Chart
- Line Chart
- Bar / Column Chart
- Area Chart
- Pie Chart
- Donut Chart
- Org Chart
- Map / Geo Chart
How to Use Google Chart?
To use Google Chart in your web page, add a link to the charts loader:
<script
src="https://www.gstatic.com/charts/loader.js">
</script>
Google Chart is easy to use.
Just add a <div> element to display the chart:
<div id="myChart" style="max-width:700px; height:400px"></div>
The <div> element must have a unique id.
Then load the Google Graph API:
- Load the Visualization API and the corechart package
- Set a callback function to call when the API is loaded
1 google.charts.load('current',{packages:['corechart']});
2 google.charts.setOnLoadCallback(drawChart);
That's all!
Line Graph
Source Code
function drawChart() {
// Set Data
var data = google.visualization.arrayToDataTable([
['Price', 'Size'],
[50,7],[60,8],[70,8],[80,9],[90,9],[100,9],
[110,10],[120,11],[130,14],[140,14],[150,15]
]);
// Set Options
var options = {
title: 'House Prices vs Size',
hAxis: {title: 'Square Meters'},
vAxis: {title: 'Price in Millions'},
legend: 'none'
};
// Draw Chart
var chart = new google.visualization.LineChart(document.getElementById('myChart'));
chart.draw(data, options);
}
Scatter Plots
To scatter plot the same data, change google.visualization to LineChart:
var chart = new google.visualization.LineChart(document.getElementById('myChart'));
Bar Charts
Source Code
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Contry', 'Mhl'],
['Italy', 55],
['France', 49],
['Spain', 44],
['USA', 24],
['Argentina', 15]
]);
var options = {
title: 'World Wide Wine Production'
};
var chart = new google.visualization.BarChart(document.getElementById('myChart'));
chart.draw(data, options);
}
Pie Charts
To convert a Bar Chart to a Pie chart, just replace:
google.visualization.BarChart
with:
google.visualization.PieChart
var chart = new google.visualization.PieChart(document.getElementById('myChart'));
3D Pie
To display the Pie in 3D, just add is3D: true to the options:
var options = {
title: 'World Wide Wine Production',
is3D: true
};
