Javascript 如何在amcharts中添加多个图形
我是amcharts的新手,我正在使用下面的代码在一个图表中生成两个图形Javascript 如何在amcharts中添加多个图形,javascript,amcharts,Javascript,Amcharts,我是amcharts的新手,我正在使用下面的代码在一个图表中生成两个图形 var chart = AmCharts.makeChart("chartdiv", { "type": "serial", "dataLoader": { "url": "https://s3-us-west-2.amazonaws.com/s.cdpn.io/218423/data1.json" }, "valueAxes": [{ "gridColor": "#FFFFFF",
var chart = AmCharts.makeChart("chartdiv", {
"type": "serial",
"dataLoader": {
"url": "https://s3-us-west-2.amazonaws.com/s.cdpn.io/218423/data1.json"
},
"valueAxes": [{
"gridColor": "#FFFFFF",
"gridAlpha": 0.2,
"dashLength": 0
}],
"gridAboveGraphs": true,
"startDuration": 1,
"graphs": [{
"balloonText": "[[category]]: <b>[[value]]</b>",
"fillAlphas": 0.8,
"lineAlpha": 0.2,
"type": "column",
"valueField": "visits"
}],
"chartCursor": {
"categoryBalloonEnabled": false,
"cursorAlpha": 0,
"zoomable": false
},
"categoryField": "country",
"categoryAxis": {
"gridPosition": "start",
"gridAlpha": 0,
"tickPosition": "start",
"tickLength": 20
}
});
function setDataSet(dataset_url) {
AmCharts.loadFile(dataset_url, {}, function(data) {
chart.dataProvider = AmCharts.parseJSON(data);
chart.validateData();
});
var chart=AmCharts.makeChart(“chartdiv”{
“类型”:“串行”,
“数据加载器”:{
“url”:”https://s3-us-west-2.amazonaws.com/s.cdpn.io/218423/data1.json"
},
“价值轴”:[{
“gridColor”:“#FFFFFF”,
“gridAlpha”:0.2,
“dashLength”:0
}],
“网格图”:没错,
“起始持续时间”:1,
“图表”:[{
“文本”:“[[category]]:[[value]]”,
“填充字母”:0.8,
“lineAlpha”:0.2,
“类型”:“列”,
“valueField”:“访问”
}],
“图表光标”:{
“CategoryBallooneEnabled”:false,
“cursorAlpha”:0,
“可缩放”:错误
},
“类别字段”:“国家”,
“分类法”:{
“网格位置”:“开始”,
“gridAlpha”:0,
“滴答声位置”:“开始”,
“滴答声长度”:20
}
});
函数setDataSet(数据集\ url){
加载文件(数据集\ url,{},函数(数据){
chart.dataProvider=AmCharts.parseJSON(数据);
chart.validateData();
});
因此,这非常有效,现在我想在图表中添加多个图形,而不是一个图形。但我不想在之前定义需要多少个图形(没有固定大小)。那么如何在amcharts中动态添加图形呢?非常感谢您的帮助假设您已经预先知道categoryField,您可以使用dataLoader的
complete
回调查看新分配的dataProvider
数组,并根据数组对象中的键创建图形
"dataLoader": {
"url": "https://s3-us-west-2.amazonaws.com/s.cdpn.io/t-160/SO-41015973.json",
"complete": function(chart) {
//get potential valueFields after filtering out the categoryField
var valueFields = Object.keys(chart.dataProvider[0]).filter(function(value) {
return value !== chart.categoryField;
});
//create the graphs
valueFields.forEach(function(valueField) {
chart.graphs.push({
"valueField": valueField,
"type": "column",
"balloonText": "[[category]]: <b>[[value]]</b>",
"fillAlphas": 0.8,
"lineAlphas": 0.2
})
});
}
},
“数据加载器”:{
“url”:”https://s3-us-west-2.amazonaws.com/s.cdpn.io/t-160/SO-41015973.json",
“完成”:功能(图表){
//过滤掉categoryField后获取潜在的valueFields
var valueFields=Object.keys(chart.dataProvider[0]).filter(函数(值){
返回值!==chart.categoryField;
});
//创建图形
valueFields.forEach(函数(valueField){
chart.graphs.push({
“valueField”:valueField,
“类型”:“列”,
“文本”:“[[category]]:[[value]]”,
“填充字母”:0.8,
“lineAlphas”:0.2
})
});
}
},
我在您的数据中添加了一个额外的字段,并创建了一个字段来显示这一点。如果我添加更多的日期范围周期,它只显示为点,并且该点光标指示foo1和foo3的最后一个值。我可以显示平均值吗?