[Bug] When polar coordinates are negative, it still renders the bar from 0.

[BillYu811]

Version

5.3.0

Link to Minimal Reproduction

https://codepen.io/billyu811/pen/QWaQZvg

Steps to Reproduce

1.I want to create a polar chart as usual, but it has negative values ​​on the radius axis.
2.I got data from BE use axios.
3.I didn't get the effect I wanted,I want it to fill the bar towards positive numbers starting from a minimum value.
But it turned out to be this:
https://codepen.io/billyu811/pen/QWaQZvg
4.then I tried to change the min, max, scale, axisLine.onZero of the radius axis, they are not work.
I can't find a solution in the doc.
Until I saw a PR that seemed to fixed the same problem.But I don't know why it reappeared.
#12418

Current Behavior

I want to create a polar chart, but I got the opposite bar.

Expected Behavior

I want fill the bar towards positive numbers starting from a minimum value.

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

Please let me know if I'm using a wrong option, or something is wrong with my code, or if it's just a bug.

[echarts-bot]

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[jiawulin001]

Interestingly enough, I find all bar charts start at 0. And since radius axis bar charts are based on original charts, they must also start at 0. @pissang Does Echarts need a new feature to accept a number instead of 0 as the starting value of the bar chart?
However, there are still alternatives for @BillYu811 to achieve the effect you want. Here's an example but need a bit adjustment on data.

Code Sample

option = {
  title: [
    {
      text: 'Radial Polar Bar Label Position (middle)'
    }
  ],
  polar: {
    radius: [30, '80%']
  },
  radiusAxis: {
    min:0,
    max:30,
    axisLabel:{
      formatter: value=>value-120
    },
  },
  angleAxis: {
    type: 'category',
    data: ["  0-30", " 30-60", " 60-90", " 90-120", "120-150", "150-180", "180-210", "210-240", "240-270", "270-300", "300-330", "330-360"],
    startAngle: 75
  },
  tooltip: {
    formatter: (params)=> `${params.name}: ${(params.value-120)}`
  },
  series: {
    type: 'bar',
    color: "#F53700",
    data: [13, 13, 12, 11, 10, 10, 10, 11, 11, 13, 12, 13 ],
    //data: [-107,-107,-108,-109,-110,-110,-110,-109,-109,-107,-108,-107],
    coordinateSystem: 'polar',
    label: {
      show: true,
      formatter: (params)=> `${(params.value-120)}`
    }
  },
  backgroundColor: '#fff',
  animation: false
};

[BillYu811]

First of all, thanks for your reply, have a happy weekend,

This sample seems to solve my problem to a certain extent, But I'm worried that when my data changes I also have to modify my FE code =>

• First: I can't predict what kind of data will get from the BE.

• Second: I would prefer to build a reusable component that will adapt to any situation. This is more in line with engineering thinking.

• At the same time, this sample code doesn't seem very elegant.

All in all, I think maybe we need a new feat that accepts a value as a starting value?
@pissang @jiawulin001

Interestingly enough, I find all bar charts start at 0. And since radius axis bar charts are based on original charts, they must also start at 0. @pissang Does Echarts need a new feature to accept a number instead of 0 as the starting value of the bar chart? However, there are still alternatives for @BillYu811 to achieve the effect you want. Here's an example but need a bit adjustment on data.

Code Sample

[BillYu811]

Also I found an interesting thing, when I used "pyechart" to render the result I wanted, it did what I expected. Like the example below:
https://codepen.io/billyu811/pen/VwyxNep
This also makes me very suspicious.
@jiawulin001 @pissang

Interestingly enough, I find all bar charts start at 0. And since radius axis bar charts are based on original charts, they must also start at 0. @pissang Does Echarts need a new feature to accept a number instead of 0 as the starting value of the bar chart? However, there are still alternatives for @BillYu811 to achieve the effect you want. Here's an example but need a bit adjustment on data.

Code Sample

[jiawulin001]

I guess that's because the result you want is the problem that #12418 wants to solve. Anyway, glad that you find a way to solve it.

[BillYu811]

I'm very sorry for my short description, it caused you to misunderstand what I meaning.Please allow me to express in more details:

• I am trying to use echart-5.3.0 in VUE to achieve the following effects: https://codepen.io/billyu811/pen/QWaQZvg
• This PR should have fixed the issue I raised, but it didn't, this bug reappeared in 5.3.0 or earlier. Fix 12109 #12418
• I am confused that this bug is not present in the version of echart used by py-echart. Even though that echart version does what I want, I can't use it in npm.
• I could use the alternative in the code sample above, but it's not elegant enough. It may prone to some unknown bugs. I described my worries above.
• To sum up, I think a new official feature will be best.

please let me know your idea.
@jiawulin001

I guess that's because the result you want is the problem that #12418 wants to solve. Anyway, glad that you find a way to solve it.

[BillYu811]

Any update? @jiawulin001 @pissang

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This issue has been automatically marked as stale because it did not have recent activity. It will be closed in 7 days if no further activity occurs. If you wish not to mark it as stale, please leave a comment in this issue.

[github-actions]

This issue has been automatically closed because it did not have recent activity. If this remains to be a problem with the latest version of Apache ECharts, please open a new issue and link this to it. Thanks!