CODEWITHSUNDEEP
javascriptchart.js
Ridge Robinson
Ridge Robinson

Reputation: 758

Chart.js yAxes Ticks stepSize not working (fiddle)

I have created a line chart with these options for the yAxis:

yAxes: [{
    ticks: {
        precision: 1,
        stepSize: 18.1,
        min: 148.5,
        max: 220.9
    }
}]

I would like, therefore, the yAxis scales to be like this:

220.9
202.8
184.7
166.6
148.5

However, when I provide this code, I am getting this data.

enter image description here

Please see this fiddle for an example: https://jsfiddle.net/wxLzdrcm/

How can I make the yAxis ticks add up like I have described?

Upvotes: 1

Views: 2193

Answers (1)

GalAbra
GalAbra

Reputation: 5138

This question was asked at least twice (1, 2).

The solution is to use min and max values so that stepSize is a factor of max - min, allowing the chart to actually use the specified stepSize:

yAxes: [{
  ticks: {
    maxTicksLimit: 5,
    min: 144.8, // 18.1 * 8
    max: 235.3, // 18.1 * 13
    stepSize: 18.1,
  },
}]

enter image description here

An alternative would be using suggestedMin and suggestedMax rather than min and max, which allows Chart.js to calculate its own min and max:

In your case, you just need to apply:

yAxes: [{
  ticks: {
    maxTicksLimit: 5,
    suggestedMin: 148.5,
    suggestedMax: 220.9,
    stepSize: 18.1,
  },
}]

Upvotes: 1

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