我正在从 csv 数据创建折线图。图表如下所示:
虽然看起来不错，但它没有显示正确的图表。有人可以告诉我这里有什么问题吗？
图形代码:
<html>
<head>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js" type="text/javascript"></script>
<script src="http://jquery-csv.googlecode.com/files/jquery.csv-0.71.js"></script>
<script type="text/javascript">
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
// grab the CSV
$.get("Chart3-data1.csv", function(csvString) {
// transform the CSV string into a 2-dimensional array
var arrayData = $.csv.toArrays(csvString, {onParseValue: $.csv.hooks.castToScalar});
alert(arrayData);
// this new DataTable object holds all the data
var data = new google.visualization.arrayToDataTable(arrayData);
// this view can select a subset of the data at a time
var view = new google.visualization.DataView(data);
view.setColumns([0,1]);
// set chart options
var options = {
title: "A Chart from a CSV!",
legend: 'none'
};
var chart = new google.visualization.LineChart(document.getElementById('gauge'));
chart.draw(data, options);
});
}
</script>
</head>
<body>
<div id="gauge" style="width: 900px; height: 500px;"></div>
</body>
csv 数据:
"Date,Term,Segment,Visitor"
"2014/01/01,2014/01/01 - 2014/01/31,All visitors,2"
"2014/01/01,2014/01/01 - 2014/01/31,New user,0"
"2014/01/01,2014/01/01 - 2014/01/31,Mobile traffic,0"
"2014/01/02,2014/01/01 - 2014/01/31,All visitors,7"
"2014/01/02,2014/01/01 - 2014/01/31,New user,1"
"2014/01/02,2014/01/01 - 2014/01/31,Mobile traffic,0"
"2014/01/03,2014/01/01 - 2014/01/31,All visitors,5"
"2014/01/03,2014/01/01 - 2014/01/31,New user,0"
最佳答案
问题在于放置非结构化 csv 数据。一旦csv数据被处理，它就可以显示所需的图表。
看这段代码:
<html>
<head>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js" type="text/javascript"></script>
<script src="http://jquery-csv.googlecode.com/files/jquery.csv-0.71.js"></script>
<script type="text/javascript">
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart()
{
$.get("Chart3-data1.csv", function(csvString)
{
var transData = [['Date', 'All visitors', 'New user', 'Mobile traffic']];
var arrayData = $.csv.toArrays(csvString, {onParseValue: $.csv.hooks.castToScalar});
for (var i = 1; i < arrayData.length; i++)
{
//console.log(arrayData[i][0]);
var fields = arrayData[i][0].split(',');
console.log(fields);
switch ( (i - 1) % 3)
{
case 0:
var allVisitors = parseInt(fields[3]);
break;
case 1:
var newUser = parseInt(fields[3]);
break;
case 2:
var mobile = parseInt(fields[3]);
transData.push([ fields[0], allVisitors, newUser, mobile] );
break;
}
}
var data = new google.visualization.arrayToDataTable(transData);
var options =
{
title: 'Website traffic chart from CSV data3!'
};
var chart = new google.visualization.LineChart(document.getElementById('gauge'));
chart.draw(data, options);
});
}
</script>
</head>
<body>
关于javascript - 从 csv 数据创建折线图，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21515100/