Y-axis scale precision problem

Question

I have a problem where the scale for the y-axis uses a single decimal for precision except for one particular value. See the following image:

Screenshot 2022-07-05 102155.png

I have set the minimum to 0 and the maximum to 0.5 and interval to 0.1. I set labelFormat to '{value} ntu'. Why does the scale value label for 0.3 show as 0.300?

Swetha Babu · Answer

Hi Travis,Greetings from Syncfusion.We have considered the reported scenario as a bug and logged
a defect report for the same. The fix for the reported scenario will be
included in our weekly patch release which is expected to be rolled out on 19th
July, 2022. Please find the below feedback link to keep track of the reported
scenario.Feedback link: https://www.syncfusion.com/feedback/36141/axis-label-interval-is-not-properIf you have
any more specification/precise replication procedure or a scenario to be
tested, you can add it as a comment in the portal.Regards,Swetha

Swetha Babu · Answer

Hi Travis,Thank you for your patience.When we tried to fix the reported scenario, we came to know
that when we add 0.2 and 0.1, it gives 0.3000004. Refer the below linkStackOverflow link:  https://stackoverflow.com/questions/588004/is-floating-point-math-brokenSo, to overcome the reported issue, we can set the labelFormat
property in primaryYAxis as n1 and change the first label in the
y-axis as 0 using the text argument in axisLabelRender event in
Charts. We have created a simple Javascript application to demonstrate the
same. Please find the below stackblitz link for your sample reference and stack
overflow link for your reference.Sample link: https://stackblitz.com/edit/7tydmz-n6ctgt?file=index.jsCode Snippet:

primaryYAxis: {
      minimum: 0,
      maximum: 0.5,
      interval: 0.1,
      lineStyle: { width: 0 },
      labelFormat: 'n1',
    },
   
  axisLabelRender: function (args) {
      if (args.text === '0.0' &&
  args.axis.name == 'primaryYAxis') {
        args.text = '0';
      }
    },

Screenshot:Kindly, revert us if you have any concerns.Regards,Swetha