有没有办法使用chart.js绘制浮动矩形

有没有办法使用chart.js绘制浮动矩形,chart.js,Chart.js,我需要在折线图上画一个矩形。。有人请帮忙,我想在折线图上画一个浮动矩形。矩形的xy坐标是动态的&将作为变量传递,就像下面创建阵列的方式一样 <html> <head> <title>Line Chart</title> <script src="Chart.js"></script> <meta http-equiv="refresh" content="1"/> </head>

我需要在折线图上画一个矩形。。有人请帮忙,我想在折线图上画一个浮动矩形。矩形的xy坐标是动态的&将作为变量传递,就像下面创建阵列的方式一样

<html>
<head>
    <title>Line Chart</title>
    <script src="Chart.js"></script>
    <meta http-equiv="refresh" content="1"/>
</head>
<body>
    <div style="width: 60%">
    <canvas id="mycanvas" height="300" width="750" class="subcanvas"> </canvas>
    </div>
    <script>
    var chrt1 = document.getElementById("mycanvas").getContext("2d");
    chrt1.beginPath();
    chrt1.lineWidth="20";
    chrt1.strokeStyle="red";
    chrt1.rect(200,200,50,50);
    chrt1.stroke();
    var lineOptions = {
        animation:false,
        pointDotRadius: 0,
        responsive: false
    };
    var mmaxis = [];
    var loadaxis = [];

    mmaxis[0] = :="plotdb".xarray[0]:
    mmaxis[1] = :="plotdb".xarray[1]:
    mmaxis[2] = :="plotdb".xarray[2]:
    mmaxis[3] = :="plotdb".xarray[3]:
    mmaxis[4] = :="plotdb".xarray[4]:
    mmaxis[5] = :="plotdb".xarray[5]:
    mmaxis[6] = :="plotdb".xarray[6]:
    mmaxis[7] = :="plotdb".xarray[7]:
    mmaxis[8] = :="plotdb".xarray[8]:
    mmaxis[9] = :="plotdb".xarray[9]:
    mmaxis[10] = :="plotdb".xarray[10]:
    mmaxis[11] = :="plotdb".xarray[11]:
    mmaxis[12] = :="plotdb".xarray[12]:
    mmaxis[13] = :="plotdb".xarray[13]:
    mmaxis[14] = :="plotdb".xarray[14]:
    mmaxis[15] = :="plotdb".xarray[15]:
    mmaxis[16] = :="plotdb".xarray[16]:
    mmaxis[17] = :="plotdb".xarray[17]:
    mmaxis[18] = :="plotdb".xarray[18]:
    mmaxis[19] = :="plotdb".xarray[19]:
    mmaxis[20] = :="plotdb".xarray[20]:

    loadaxis[0] = :="plotdb".yarray[0]:
    loadaxis[1] = :="plotdb".yarray[1]:
    loadaxis[2] = :="plotdb".yarray[2]:
    loadaxis[3] = :="plotdb".yarray[3]:
    loadaxis[4] = :="plotdb".yarray[4]:
    loadaxis[5] = :="plotdb".yarray[5]:
    loadaxis[6] = :="plotdb".yarray[6]:
    loadaxis[7] = :="plotdb".yarray[7]:
    loadaxis[8] = :="plotdb".yarray[8]:
    loadaxis[9] = :="plotdb".yarray[9]:
    loadaxis[10] = :="plotdb".yarray[10]:
    loadaxis[11] = :="plotdb".yarray[11]:
    loadaxis[12] = :="plotdb".yarray[12]:
    loadaxis[13] = :="plotdb".yarray[13]:
    loadaxis[14] = :="plotdb".yarray[14]:
    loadaxis[15] = :="plotdb".yarray[15]:
    loadaxis[16] = :="plotdb".yarray[16]:
    loadaxis[17] = :="plotdb".yarray[17]:
    loadaxis[18] = :="plotdb".yarray[18]:
    loadaxis[19] = :="plotdb".yarray[19]:
    loadaxis[20] = :="plotdb".yarray[20]:


    var lineChartData = {
        labels :mmaxis,
        datasets : [
        {
        label: "Load Vs Disp",
        fillColor : "rgba(255,255,255,0.2)",
        strokeColor : "rgba(10,10,10,1)",
        pointColor : "rgba(0,0,0,1)",
        pointStrokeColor : "#0",
        pointHighlightFill : "#0",
        pointHighlightStroke : "rgba(0,0,0,10)",
        data :loadaxis
        }
        ]
    }
    window.onload = function()
    {
        window.chrt1
        var chrt = document.getElementById("mycanvas").getContext("2d");
        window.myFirstChart = new Chart(chrt).Line(lineChartData,lineOptions);
    }
    </script>
</body>
</html>

折线图
var chrt1=document.getElementById(“mycanvas”).getContext(“2d”);
chrt1.beginPath();
chrt1.lineWidth=“20”;
chrt1.strokeStyle=“红色”;
chrt1.rect(200200,50,50);
chrt1.stroke();
变量行选项={
动画:错,
点半径:0,
回答:错
};
var mmaxis=[];
var loadaxis=[];
mmaxis[0]=:=“plotdb”.xarray[0]:
mmaxis[1]=:=“plotdb”.xarray[1]:
mmaxis[2]=:=“plotdb”.xarray[2]:
mmaxis[3]=:=“plotdb”.xarray[3]:
mmaxis[4]=:=“plotdb”.xarray[4]:
mmaxis[5]=:=“plotdb”.xarray[5]:
mmaxis[6]=:=“plotdb”.xarray[6]:
mmaxis[7]=:=“plotdb”.xarray[7]:
mmaxis[8]=:=“plotdb”.xarray[8]:
mmaxis[9]=:=“plotdb”.xarray[9]:
mmaxis[10]=:=“plotdb”.xarray[10]:
mmaxis[11]=:=“plotdb”.xarray[11]:
mmaxis[12]=:=“plotdb”.xarray[12]:
mmaxis[13]=:=“plotdb”.xarray[13]:
mmaxis[14]=:=“plotdb”.xarray[14]:
mmaxis[15]=:=“plotdb”.xarray[15]:
mmaxis[16]=:=“plotdb”.xarray[16]:
mmaxis[17]=:=“plotdb”.xarray[17]:
mmaxis[18]=:=“plotdb”.xarray[18]:
mmaxis[19]=:=“plotdb”.xarray[19]:
mmaxis[20]=:=“plotdb”.xarray[20]:
loadaxis[0]=:=“plotdb”.yarray[0]:
loadaxis[1]=:=“plotdb”.yarray[1]:
loadaxis[2]=:=“plotdb”.yarray[2]:
loadaxis[3]=:=“plotdb”.yarray[3]:
loadaxis[4]=:=“plotdb”.yarray[4]:
loadaxis[5]=:=“plotdb”.yarray[5]:
loadaxis[6]=:=“plotdb”.yarray[6]:
loadaxis[7]=:=“plotdb”.yarray[7]:
loadaxis[8]=:=“plotdb”.yarray[8]:
loadaxis[9]=:=“plotdb”.yarray[9]:
loadaxis[10]=:=“plotdb”.yarray[10]:
loadaxis[11]=:=“plotdb”。yarray[11]:
loadaxis[12]=:=“plotdb”。yarray[12]:
loadaxis[13]=:=“plotdb”.yarray[13]:
loadaxis[14]=:=“plotdb”.yarray[14]:
loadaxis[15]=:=“plotdb”.yarray[15]:
loadaxis[16]=:=“plotdb”.yarray[16]:
loadaxis[17]=:=“plotdb”.yarray[17]:
loadaxis[18]=:=“plotdb”.yarray[18]:
loadaxis[19]=:=“plotdb”。yarray[19]:
loadaxis[20]=:=“plotdb”。yarray[20]:
变量lineChartData={
标签:mmaxis,
数据集:[
{
标签:“加载Vs显示”,
填充颜色:“rgba(255255,0.2)”,
strokeColor:“rgba(10,10,10,1)”,
pointColor:“rgba(0,0,0,1)”,
pointStrokeColor:#0“,
pointHighlightFill:“0”,
pointHighlightStroke:“rgba(0,0,0,10)”,
数据:loadaxis
}
]
}
window.onload=函数()
{
window.chrt1
var chrt=document.getElementById(“mycanvas”).getContext(“2d”);
window.myFirstChart=新图表(chrt).Line(lineChartData,lineOptions);
}

chart.js有一个名为chartjs-plugin-annotation.js的插件(也可以在bower上找到)

包含该js文件后,您可以执行以下操作:

var myChart = new Chart(document.getElementById("myChart"), {
     type: 'bubble',
          data: {
              datasets:[
                 ...
              ]
           },
          options:{
             scales: {
                yAxes: [{
                   ...
                }],
                xAxes: [{
                   ...
                }],
             },

        annotation: {
          annotations: [{
            type: 'box',

            // ID of the X scale to bind onto
            xScaleID: 'x-axis-0',

            // ID of the Y scale to bind onto
            yScaleID: 'y-axis-0',

            // Left edge of the box. in units along the x axis
            xMin: 25,

            // Right edge of the box
            xMax: 40,

            // Top edge of the box in units along the y axis
            yMax: 20,

            // Bottom edge of the box
            yMin:  15,

            // Stroke color
            borderColor: 'red'

            // Stroke width
            borderWidth: 4,
         }]
      }
   }

您可能想使用此处列出的设置,但这将为您绘制一个矩形

chart.js有一个名为chartjs-plugin-annotation.js的插件(也可以在bower上找到)

包含该js文件后,您可以执行以下操作:

var myChart = new Chart(document.getElementById("myChart"), {
     type: 'bubble',
          data: {
              datasets:[
                 ...
              ]
           },
          options:{
             scales: {
                yAxes: [{
                   ...
                }],
                xAxes: [{
                   ...
                }],
             },

        annotation: {
          annotations: [{
            type: 'box',

            // ID of the X scale to bind onto
            xScaleID: 'x-axis-0',

            // ID of the Y scale to bind onto
            yScaleID: 'y-axis-0',

            // Left edge of the box. in units along the x axis
            xMin: 25,

            // Right edge of the box
            xMax: 40,

            // Top edge of the box in units along the y axis
            yMax: 20,

            // Bottom edge of the box
            yMin:  15,

            // Stroke color
            borderColor: 'red'

            // Stroke width
            borderWidth: 4,
         }]
      }
   }
您可能想使用此处列出的设置,但这将为您绘制一个矩形