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How to hide data or label when the value is 0

Viewing 3 posts - 1 through 3 (of 3 total)
  • July 26, 2018 at 5:18 pm #21990

    Gnutzmann

    I have a pie chart and some values are 0 and some are not.
    I’m using PHP with it, but when i try this function:

    function hideIndexLabel() {
      var length = chart.options.data[0].dataPoints.length;
      for( i = 0; i < length; i++ ) {
        if( chart.options.data[0].dataPoints[i].y === 0  || chart.options.data[0].dataPoints[i].y === null ) {
            chart.options.data[0].dataPoints[i].indexLabel = "";
        }
        else
          chart.options.data[0].dataPoints[i].indexLabel = chart.options.data[0].dataPoints[i].indexLabel;
      }      
}

hideIndexLabel();

    It doesn’t work because I am not using the native JS script for dataPoints.
    Can someone help me?

    My code:
    (ahead just data coming from the database)

    $dataPoints = array(
        array("y" => $S, "label" => "Em atendimento uma vez por semana"),
        array("y" => $S2, "label" => "Em atendimento duas vez por semana"),
        array("y" => $N, "label" => "Não está sendo atendido"),
        array("y" => $LE, "label" => "Na lista de espera"),
        array("y" => $AV, "label" => "Em avaliação"),
        array("y" => $AC, "label" => "Em acompanhamento"),
        array("y" => $AD, "label" => "Em acompanhamento domiciliar"),
        array("y" => $SG, "label" => "Atendimento Grupal"),
        array("y" => $SI, "label" => "Atendimento individual")
    );
?>
<script>
window.onload = function() {

var chart = new CanvasJS.Chart("chartContainer", {
	animationEnabled: true,
	title: {
		text: "Pessoas sendo atendidas no setor da educação especial "
	},
	data: [{
		type: "pie",
		startAngle: 240,
		indexLabel: "{label} {y}",
		dataPoints: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
        
	}]
});
           
           function hideIndexLabel() {
      for(var i = 0; i < chart.options.data[0].dataPoints.length; i++) {
 if(chart.options.data[0].dataPoints[i].y === 0)
  chart.options.data[0].dataPoints[i].indexLabel = "";
}
}

hideIndexLabel();
chart.render();

}
</script>
</head>
<body>
<div id="chartContainer" style="height: 370px; max-width: 920px; margin: 0px auto;"></div>
<script src="canvasjs.min.js"></script>
</body>
</html>
    July 27, 2018 at 12:09 pm #22002

    Priyanka M S

    @Gnutzmann,

    While you are updating the indexLabel of dataPoints with y-value 0 or null, you can also set the indexLabelLineThickness to 0 so that they are not displayed on the pie chart. The code snippet below shows how you can achieve the same:

    function hideIndexLabel() {
  var length = chart.options.data[0].dataPoints.length;
  for(var i = 0; i < length; i++ ) {		  
    if( chart.options.data[0].dataPoints[i].y === 0  || chart.options.data[0].dataPoints[i].y === null ) {
      chart.options.data[0].dataPoints[i].indexLabel = " ";
      chart.options.data[0].dataPoints[i].indexLabelLineThickness = 0;
    }
    else
      chart.options.data[0].dataPoints[i].indexLabel = chart.options.data[0].dataPoints[i].indexLabel;
  }      
}

    Please take a look at this updated sample project for a working example with sample code.

    CanvasJS basic pie chart with custom indexLabel in PHP

    __
    Priyanka M S
    Team CanvasJS

    July 28, 2018 at 6:50 pm #22029

    Gnutzmann

    Thank you so much

Viewing 3 posts - 1 through 3 (of 3 total)

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