Highcharts - 没有初始数据的Dyanmic图 [英] Highcharts - Dyanmic graph with no initial data

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本文介绍了Highcharts - 没有初始数据的Dyanmic图的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

如果您使用动态样条更新打开此JSFiddle,它会在每秒开始更新之前加载20个点的系列。

示例



我不想显示任何初始数据,并让间隔在他们进入时添加点。



所以我改变了:

 系列:[{
name:'Random data',
data:(function(){
//产生一个随机数据数组
var data = [],
time =(new Date())。getTime(),
i;

for(i = -19; i <= 0; i ++){
data.push({
x:time + i * 1000,
y:Math.random()
});
}
返回数据;
})()
}]

 系列:[{
name:'Random data',
data:[]
}]

但它没有添加点。是否有我缺少的东西?

解决方案

更改您的载入功能,以便移动参数在您添加之前不适用您的20个值,请参阅 此jsfiddle

  load:function(){

//设置每秒更新图表
var series = this.series [0 ],
maxSamples = 20,
count = 0;
setInterval(function(){
var x =(new Date())。getTime(),//当前时间
y = Math.random();
series.addPoint (
[x,y]
,true
,(++ count> = maxSamples)
);
},1000);
}


If you open this JSFiddle with the dynamic spline update it loads the series with 20 points before it starts updating every second.

Example

I don't want to display any initial data and let the interval add the points as they come in.

So I change:

series: [{
            name: 'Random data',
            data: (function() {
                // generate an array of random data
                var data = [],
                    time = (new Date()).getTime(),
                    i;

                for (i = -19; i <= 0; i++) {
                    data.push({
                        x: time + i * 1000,
                        y: Math.random()
                    });
                }
                return data;
            })()
        }]

to

series: [{
            name: 'Random data',
            data: []
        }]

But it doesnt add the points. Is there something I am missing?

解决方案

Change your load function so that the shift parameter doesn't apply before you've added your 20 values, see this jsfiddle

load: function() {

    // set up the updating of the chart each second
    var series = this.series[0],
        maxSamples = 20,
        count = 0;
    setInterval(function() {
        var x = (new Date()).getTime(), // current time
            y = Math.random();
        series.addPoint(
            [x,y]
            , true
            , (++count >= maxSamples)
        );
    }, 1000);
}

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