google_visualization_api_test2.js

google.load("visualization", "1", {packages:["linechart"]});
google.setOnLoadCallback(drawChart);

function drawChart1(){
    var data = new google.visualization.DataTable();

    data.addColumn('string', 'days');
    data.addColumn('number', 'キャベツ');
    data.addColumn('number', 'にんじん');

    dataHash = getData();

    data.addRows(dataHash.length);

    $.each(dataHash,
	   function(i,v){
	       data.setValue(i, 0, v.label);
	       data.setValue(i, 1, v.data1);
	       data.setValue(i, 2, v.data2);
	   });

    var chart = new google.visualization.LineChart(document.getElementById('chart_div'));

    options = {
	width: 600,
	height: 350,
	legend: 'bottom',
	title: '野菜のお値段'
    };
    chart.draw(data, options);

}

function getData(){
    return data = [
	{label:"2010/4/20", data1:350, data2:80},
	{label:"2010/4/21", data1:320, data2:78},
	{label:"2010/4/22", data1:300, data2:73},
	{label:"2010/4/23", data1:280, data2:75},
	{label:"2010/4/24", data1:290, data2:75},
	{label:"2010/4/25", data1:288, data2:76},
	{label:"2010/4/26", data1:270, data2:75}
    ];
}