Labels not working correctly

[Samuel]

Hi

I’m trying to create a gender comparison chart. After som help from the CanvasJS team I got it to look almost like I want it but the labels are incorrect.

Heres the code

var dataSet = [{ x: 10, y: 71, position: "upperValue", label: "13-17" },
               { x: 20, y: 55, position: "upperValue", label: "18-24" },
               { x: 30, y: 55, position: "upperValue", label: "24-34" },
               { x: 40, y: 65, position: "upperValue", label: "35-44" },
               { x: 50, y: 95, position: "upperValue", label: "45-54" },
               { x: 10, y: 51, position: "lowerValue", label: "13-17" },
               { x: 20, y: 95, position: "lowerValue", label: "18-24" },
               { x: 30, y: 20, position: "lowerValue", label: "25-34" },
               { x: 40, y: 85, position: "lowerValue", label: "35-44" },
               { x: 50, y: 15, position: "lowerValue", label: "45-54" }];

   var chartGender = new CanvasJS.Chart("chartGender",{
     axisY: {
       labelFormatter: function(e) {
         if (e.value < 0)
           return label = -1 * e.value;
         else
           return label =  e.value;
       }
     },
     toolTip:{
       contentFormatter: function ( e ) {
         if( e.entries[0].dataPoint.y < 0)
           return e.entries[0].dataPoint.x + ": " + -1 * e.entries[0].dataPoint.y ;
         else
           return e.entries[0].dataPoint.x + ": " + e.entries[0].dataPoint.y ;
       }},
     data: [
       {
         type: "column",
         dataPoints: [ ]
       }
     ]
   });

   for( var i = 0; i < dataSet.length; i++ )
     if( dataSet[i].position === "lowerValue")
       chartGender.options.data[0].dataPoints.push({ x:dataSet[i].x, y: (-1 * dataSet[i].y), color: "#3C6399"});
     else
       chartGender.options.data[0].dataPoints.push({ x:dataSet[i].x, y: (dataSet[i].y), color: "#899BC0" });

  chartGender.render();

This will end up with labels like 10,20,30,40,50 and not the labels I’d like to have: 13-17, 18-24, 25-34 etc.

[Priyanka M S]

Samuel,

While adding the dataPoints to chart, you need to add labels along with x and y values. Also setting axisX interval according to the dataPoints should work fine in your scenario. Please take a look at this jsfiddle.

__
Priyanka M S
Team CanvasJS

[Samuel]

Looks great! Thx.

How do I add “Women” as dark blue (name of dark blue dataset) and “Men” as the lighter blue with this setup?

[Priyanka M S]

Samuel,

You can use indexLabel for the same. Please take a look at this jsfiddle.

__
Priyanka M S
Team CanvasJS

[Samuel]

Hi

Thx but that was not what I meant.

I don’t want a label on each bar. I want 1 label in total per color, below the chart. Like this one: https://canvasjs.com/javascript-charts/multi-series-chart/

The labels “Myrtle Beach” “Martha Vineyard” etc.

[Vulpe]

@Samuel
Hey,

You can use the legend to do what you are asking.
Look at https://canvasjs.com/docs/charts/chart-options/legend/ for more info about it.
Hopefully this helps.

[Priyanka M S]

Samuel,

Legends are used to represent dataSeries in a chart. You can’t have two legends for one dataSeries. With a workaround, you can display span elements as inactive legends. Please take a look at this updated jsfiddle.

__
Priyanka M S
Team CanvasJS

[Samuel]

I still have some problems adding more values to the chart. It will only show 5 but I have 7.

var dataSet = [{ x: 10, y: 71, position: "upperValue", label: "13-17" },
               { x: 20, y: 55, position: "upperValue", label: "18-24" },
               { x: 30, y: 55, position: "upperValue", label: "25-34" },
               { x: 40, y: 65, position: "upperValue", label: "35-44" },
               { x: 50, y: 95, position: "upperValue", label: "45-54" },
               { x: 50, y: 95, position: "upperValue", label: "55-64" },
               { x: 40, y: 65, position: "upperValue", label: "65" },
               { x: 10, y: 51, position: "lowerValue", label: "13-17" },
               { x: 20, y: 95, position: "lowerValue", label: "18-24" },
               { x: 30, y: 20, position: "lowerValue", label: "25-34" },
               { x: 40, y: 85, position: "lowerValue", label: "35-44" },
               { x: 40, y: 85, position: "lowerValue", label: "45-54" },
               { x: 40, y: 85, position: "lowerValue", label: "55-64" },
               { x: 50, y: 15, position: "lowerValue", label: "65" }];

var chartGender = new CanvasJS.Chart("chartGender",{
  animationEnabled: true,
  theme: "light2",
  axisX: {
    interval: 10,
  },
  axisY: {
    labelFormatter: function(e) {
      if (e.value < 0)
        return label = -1 * e.value;
      else
        return label =  e.value;
    }
  },
  toolTip:{
    contentFormatter: function ( e ) {
      if( e.entries[0].dataPoint.y < 0)
        return e.entries[0].dataPoint.x + ": " + -1 * e.entries[0].dataPoint.y ;
      else
        return e.entries[0].dataPoint.x + ": " + e.entries[0].dataPoint.y ;
    }},
  data: [
    {
      type: "column",
      dataPoints: [ ]
    }
  ]
});

for( var i = 0; i < dataSet.length; i++ )
  if( dataSet[i].position === "lowerValue")
    chartGender.options.data[0].dataPoints.push({ x:dataSet[i].x, y: (-1 * dataSet[i].y), label: dataSet[i].label, color: "#229DA0"});
  else
    chartGender.options.data[0].dataPoints.push({ x:dataSet[i].x, y: (dataSet[i].y), label: dataSet[i].label, color: "#27B6BA" });

  chartGender.render();

The chart must be able to show more than 5 age groups.

[Priyanka M S]

Samuel,

The fiddle which we had provided before works for any number of dataPoints, provided that the x values of “upperValue” sync with the x values of “lowerValue”. Please take a look at this jsfiddle.

__
Priyanka M S
Team CanvasJS