Bar Polar Stack with Negative Values

[AndLLA]

One-line summary [问题简述]

Negative values in a "Bar Polar Stack" move the stack starting point from 0 to the lowest value (e.g. -1). In this way bars starts from the lowest (negative) value rather than 0, which leads to a miss-representation of the true areas size. Some stacks disappear "randomly".

Version & Environment [版本及环境]

• ECharts version [ECharts 版本]: 4.2.0-rc2 (and 4.0)
• Browser version [浏览器类型和版本]: all
• OS Version [操作系统类型和版本]: all

Expected behaviour [期望结果]

All bars should start from zero, with negative values going in the opposite direction (e.g. counter clock-wise), in order to maintain a proper representation of each "area". All stacks should still be visible.

ECharts option [ECharts配置项]

option = {
    angleAxis: {
         min:-1, max:15,
    },
    radiusAxis: {
        type: 'category',
        data: ['aa', 'bb', 'cc', 'dd'],
        z: 10
    },
    polar: {
    },
    series: [{
        type: 'bar',
        data: [1, 2, 3, -1],
        coordinateSystem: 'polar',
        name: 'A',
        stack: 'a'
    }, {
        type: 'bar',
        data: [2, 4, 6, 8],
        coordinateSystem: 'polar',
        name: 'B',
        stack: 'a'
    }, {
        type: 'bar',
        data: [1, 2, 3, 4],
        coordinateSystem: 'polar',
        name: 'C',
        stack: 'a'
    }],
    legend: {
        show: true,
        data: ['A', 'B', 'C']
    }
};

Here an example, notice the missing red bar for the "dd" ring.

Other comments [其他信息]

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[github-actions[bot]]

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!