我想用Chartjs显示一个图表,该图表显示实时数据并沿x轴缓慢滚动,我在这里用js小提琴尝试了一下,它像疯了似的跳来跳去:https://jsfiddle.net/rsnufpq7/
图表应仅移至左侧,旧点不在视野中,而没有此动画,如此处的第二个示例所示:https://bost.ocks.org/mike/path/
var canvas = document.getElementById('myChart');
var data = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [
{
label: "My First dataset",
fill: false,
lineTension: 0.0,
backgroundColor: "rgba(75,192,192,0.4)",
borderColor: "rgba(75,192,192,1)",
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "rgba(75,192,192,1)",
pointBackgroundColor: "#fff",
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: "rgba(75,192,192,1)",
pointHoverBorderColor: "rgba(220,220,220,1)",
pointHoverBorderWidth: 2,
pointRadius: 5,
pointHitRadius: 10,
data: [65, 59, 80, 0, 56, 55, 40],
}
]
};
var zero = 7;
function adddata(){
var value = Math.floor((Math.random() * 10) + 1);;
myLineChart.data.labels.push(zero);
myLineChart.data.labels.splice(0, 1);
myLineChart.data.datasets[0].data.splice(0, 1);
myLineChart.data.datasets[0].data.push(value);
myLineChart.update();
zero++;
}
setInterval(function(){
adddata();
},1000);
var option = {
showLines: true
};
var myLineChart = Chart.Line(canvas,{
data:data,
options:option
});
最佳答案
您的代码按预期方式工作,唯一缺少的是y轴未定义范围,并且正在动态调整。
为了实现这一目标,我将您的选择范围扩展为如下所示。
var option = {
showLines: true,
scales: {
yAxes: [{
display: true,
ticks: {
beginAtZero:true,
min: 0,
max: 100
}
}]
}
};
我已经定义了y轴的最小值和最大值,并且它不再跳跃了。
这是工作中的fiddle
关于javascript - Chartjs实时图形x轴移动,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/45664149/