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multiple chart in one page

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  • #20752

    Hello
    I hope you’re fine
    Unfortunately, my English language and programming are weak.
    This is my program, which is a chart with 4dataseries that relates to the size of the four measured gases.
    Now I need to repeat the same graph with the same names but with a different data received from a data file txt text file
    Help me please
    I need 16 charts on one page
    <!DOCTYPE HTML>
    <html>
    <head>
    <body>
    <?php

    window.onload = function () {
    // dataPoints
    var dataPoints1 = [];
    var dataPoints2 = [];
    var dataPoints3 = [];
    var dataPoints4 = [];

    var chart = new CanvasJS.Chart(“chartContainer”,{
    zoomEnabled: true,
    title: {
    text: “Measurement of gases”
    },
    toolTip: {
    shared: true

    },
    legend: {
    verticalAlign: “top”,
    horizontalAlign: “center”,
    fontSize: 14,
    fontWeight: “bold”,
    fontFamily: “calibri”,
    fontColor: “dimGrey”
    },
    axisX: {
    title: “chart updates every 60 sec ”
    },
    axisY:{
    prefix: ”,
    includeZero: false
    },
    data: [{
    // dataSeries1
    type: “line”,
    xValueType: “dateTime”,
    showInLegend: true,
    name: “AIR”,
    dataPoints: dataPoints1
    },
    {
    // dataSeries2
    type: “line”,
    xValueType: “dateTime”,
    showInLegend: true,
    name: “N2O” ,
    dataPoints: dataPoints2
    },
    {
    // dataSeries3
    type: “line”,
    xValueType: “dateTime”,
    showInLegend: true,
    name: “O2” ,
    dataPoints: dataPoints3
    },
    {
    // dataSeries4
    type: “line”,
    xValueType: “dateTime”,
    showInLegend: true,
    name: “VACUUM” ,
    dataPoints: dataPoints4

    }],
    legend:{
    cursor:”pointer”,
    itemclick : function(e) {
    if (typeof(e.dataSeries.visible) === “undefined” || e.dataSeries.visible) {
    e.dataSeries.visible = false;
    }
    else {
    e.dataSeries.visible = true;
    }
    chart.render();
    }
    }
    });

    var updateInterval = 60000;
    // initial value
    var yValue1 = 0;
    var yValue2 = 0;
    var yValue3 = 0;
    var yValue4 = 0;

    var updateChart = function (AIR,N2O,O2,VACUUM,tt) {
    yValue1 = AIR;
    yValue2 = N2O;
    yValue3 = O2;
    yValue4 = VACUUM;

    // pushing the new values
    dataPoints1.push({
    x: tt,
    y: yValue1
    });
    dataPoints2.push({
    x: tt,
    y: yValue2
    });
    dataPoints3.push({
    x: tt,
    y: yValue3
    });
    dataPoints4.push({
    x: tt,
    y: yValue4
    });
    };

    var doupdate = function (AIR,N2O,O2,VACUUM) {
    // updating legend text with updated with y Value
    yValue1 = AIR;
    yValue2 = N2O;
    yValue3 = O2;
    yValue4 = VACUUM;
    chart.options.data[0].legendText = ” AIR: ” + yValue1;
    chart.options.data[1].legendText = ” N2O: ” + yValue2;
    chart.options.data[2].legendText = ” O2: ” + yValue3;
    chart.options.data[3].legendText = ” VACUUM: ” + yValue4;
    chart.render();
    };

    var newres = function () {
    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange=function() {
    if (this.readyState == 4 && this.status == 200) {
    resdata = JSON.parse(this.responseText);
    updateChart(resdata.AIR,resdata.N2O,resdata.O2,resdata.VACUUM,resdata.time);
    doupdate(resdata.AIR,resdata.N2O,resdata.O2,resdata.VACUUM);
    }
    };
    xhttp.open(“POST”, “gettemp.php?q=dht&t=” + Math.random(), true);
    xhttp.send();
    };

    // generates first set of dataPoints
    <?php

    Date_default_timezone_set(‘Asia/Tehran’);
    $file = ‘temp.txt’;

    $data = file_get_contents($file);

    $arr = explode(PHP_EOL, $data);
    for ($i = 0; $i < count($arr); $i++) {
    if (strpos($arr[$i], ‘null’) !== false || empty($arr[$i]) || ctype_space($arr[$i])) {
    unset($arr[$i]);
    }
    }
    if(!empty($arr)){
    foreach($arr as $a){
    if(!empty($a)){
    $dec = json_decode($a, true);
    echo “updateChart(“.$dec[0].”,”.$dec[1].”,”.$dec[2].”,”.$dec[3].”,”.$dec[4]*1000 .”);”;
    $lAIR = $dec[0];
    $lN2O = $dec[1];
    $lO2 = $dec[2];
    $lVACUUM = $dec[3];
    }
    }
    echo ‘doupdate(‘.$lAIR.’,’.$lN2O.’,’.$lO2.’,’.$lVACUUM.’);’;
    }

    ?>
    // update chart after specified interval
    setInterval(function(){newres()}, updateInterval);
    }
    </script>
    <script type=”text/javascript” src=”canvasjs.min.js”></script>
    </head>
    <body>
    <div id=”chartContainer” style=”height: 300px; width: 100%;”>
    </div>
    </body>
    </html>
    samaneh.azmoodeh@gmail.com

    #20763

    @samira.2018,

    It is possible to display multiple charts in the same page with the same chart options and different dataPoints.

    You will have to create multiple chartContainers with separate id for each, and create multiple charts which you can assign to specific chartContainers and call the corresponding chart render method.
    Please take a look at the code snippet below,

    var chart1 = new CanvasJS.Chart("chartContainer1",{
        title :{
            text: "Live Data"
        },
        data: [{
    	type: "line",
            dataPoints : [
    	    { label: "apple",  y: 10  },
    	    { label: "orange", y: 15  },
    	    { label: "banana", y: 25  },
    	    { label: "mango",  y: 30  },
    	    { label: "grape",  y: 28  }
    	]
        }]
    });
    var chart2 = new CanvasJS.Chart("chartContainer2",{
        title :{
    	text: "Live Data"
        },
        data: [{
    	type: "column",
    	dataPoints : [
    	    { label: "apple",  y: 10  },
    	    { label: "orange", y: 15  },
    	    { label: "banana", y: 25  },
    	    { label: "mango",  y: 30  },
    	    { label: "grape",  y: 28  }
    	]
        }]
    });
     
    chart1.render();
    chart2.render();

    Also, kindly take a look at our documentation page for a step-by-step tutorial on how to render multiple charts in a page.

    multiple charts in a page
    __
    Priyanka M S
    Team CanvasJS

    • This reply was modified 3 years, 6 months ago by Priyanka M S.
    • This reply was modified 8 months, 3 weeks ago by Manoj Mohan.
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