Change the Y-axis values from real numbers to integers in Chart.js

Question

I have a chart that I want to include in my website using Chart.js. In the Y-axis, it gives me real numbers instead of integers. How can I change the number to integers?

Answer 1

Check the Chart.js documentation, in the Global configuration section:

// Boolean - Whether the scale should stick to integers, not floats even if drawing space is there scaleIntegersOnly: true,

Answer 2

I wasn't able to get the existing answers to work for me when using the new version 2 of Chart.js, so here's what I found to solve this problem in V2:

new Chart(ctx, {type: 'bar', data: barChartData,
  options:{ 
    scales: {
      yAxes: [{
        ticks: {
          stepSize: 1
        }
      }]
    }
  }
});

Answer 3

If you like to start in a different number than zero, you have to take that into account:

var step  = 5;
var max   = 90
var start = 40;
new Chart(income).Bar(barData, {
    scaleOverride: true,
    scaleSteps: Math.ceil((max-start)/step),
    scaleStepWidth: step,
    scaleStartValue: start
});

Answer 4

Try this, where max is the highest value of your data.

var steps = 3;
new Chart(ctx).Bar(plotData, {
    scaleOverride: true,
    scaleSteps: steps,
    scaleStepWidth: Math.ceil(max / steps),
    scaleStartValue: 0
});

Answer 5

I handled it this way in new version:

new Chart(ctx, {
  type: 'bar',
  data: chartData,
  options: {
    scales: {
      yAxes: [{
        ticks: {
          beginAtZero: true,
          callback: function(value) {if (value % 1 === 0) {return value;}}
        }
      }]
    }
  }
});

Answer 6

I know this is an old question now, but in the current version (v2.9.3) you can just set the precision of the y-axis ticks to zero to get integers:

options: {  
    scales: {
        yAxes: [{
            ticks: {
                precision: 0
            }
        }]
    }
}