我创建了一个测试图表,它运行正常。我想通过ajax获取我的数据,而不是嵌入网页。我想我需要格式化我的dataPoints数组(CKOwnerDefaultName
),以便它们可以在外部JSON文件中使用。在我的示例中,填充我的图表的数据格式为:
{ x: new Date(2009, 0), y: 15 },
我查看了Canvas JS站点,他们使用了以下Ajax调用示例:
{
name: "File Sharing",
showInLegend: true,
type: "stackedColumn100",
color: "#4192D9 ",
indexLabel: "{y}",
dataPoints: [
{ x: new Date(2009, 0), y: 15 },
{ x: new Date(2010, 0), y: 15 },
{ x: new Date(2011, 0), y: 12 },
{ x: new Date(2012, 0), y: 10 },
{ x: new Date(2013, 0), y: 12 },
{ x: new Date(2014, 0), y: 10 }
]
},
不确定这是否有所不同,但上面AJAX调用中使用的JSON数据的格式为:
var dataPoints = [];
$.getJSON("https://canvasjs.com/services/data/datapoints.php?xstart=1&ystart=10&length=100&type=json", function(data) {
$.each(data, function(key, value){
dataPoints.push({x: value[0], y: parseInt(value[1])});
});
var chart = new CanvasJS.Chart("chartContainer",{
title:{
text:"Rendering Chart with dataPoints from External JSON"
},
data: [{
type: "line",
dataPoints : dataPoints,
}]
});
chart.render();
});
答案 0 :(得分:6)
修改强>
https://jsfiddle.net/uvac6rdz/2/
使用已编辑的数据格式来匹配OP的首选axisX。
var chart = new CanvasJS.Chart("chartContainer", {
title: {
text: "Composition of Internet Traffic in North America",
horizontalAlign: "right"
},
axisX: {
tickThickness: 0,
interval: 1,
intervalType: "year"
},
animationEnabled: true,
toolTip: {
shared: true
},
axisY: {
lineThickness: 0,
tickThickness: 0,
interval: 20
},
legend: {
verticalAlign: "center",
horizontalAlign: "left"
},
data: [
{
name: "Real-Time",
showInLegend: true,
type: "column",
color: "#004B8D ",
indexLabel: "{y}",
dataPoints: [
{ x: new Date(2009,0), y: 12 },
{ x: new Date(2010,0), y: 7 },
{ x: new Date(2011,0), y: 6},
{ x: new Date(2012,0), y: 6},
{ x: new Date(2013,0), y: 9},
{ x: new Date(2014,0), y: 13},
{ x: new Date(2015,0), y: 12},
{ x: new Date(2016,0), y: 15},
{ x: new Date(2017,0), y: 14}
]
},
]
});
chart.render();
我更改了以下内容:
axisX.intervalType
从"year"
到"number"
的类型
(由于您的样本数据)。
将您的样本数据格式化为[[1,12],[2,7]...
以遵循
[{x: 1, y: 12}, {x: 2, y: 7},...
从stackedColumn100
到column
的图表类型。
查看canvasJS的文档,该示例要求您格式化要遵循的数据:
{x: valueX, y: valueY}