Incubator-echarts: Waterfall chart cannot process negative value as expected

Created on 20 Dec 2019 · 3Comments · Source: apache/incubator-echarts

Version

4.5.0

Reproduction link

Steps to reproduce

originData = [-200,-120,-100,228,150,135,178,286,-119,-361,-203]

What is expected?

It should handle negative value as excepted,
eg: falling from 400 to -400, the bar should cross zero axis, total height is 800

WX20191220-151604

What is actually happening?

When the value is falling from positive value to negative value, the bar is still above zero axis.

Relate issue #5308

discussion-required en new-feature

Source

natee

👍2

Most helpful comment

stacked bar does not support that mix positive and negative value.
Perhaps we can only use custom series to render this kind of diagram.

But should we support that specify the start points for each bar for this kind of scenario?
For example,

option = {
    xAxis: {},
    yAxis: {},
    series: [{
        bar: 'bar',
        encode: {
            x: 0,
            // When there are more than one dimensions specified on y,
            // the first dimension indicates the bar start, and the second 
            // indicates bar end.
            y: [1, 2] 
        },
        data: [
           //               bar start, bar end
            ['11-01',      55,            90],
            ['11-02',      65,           120],
            ['11-03',      75,           60],
            ['11-04',      85,           50]
        ]
    }]
}

100pah on 24 Dec 2019

👀2 👍2

All 3 comments

Hi! We've received your issue and please be patient to get responded. 🎉
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Have a nice day! 🍵

echarts-bot[bot] on 20 Dec 2019

stacked bar does not support that mix positive and negative value.
Perhaps we can only use custom series to render this kind of diagram.

But should we support that specify the start points for each bar for this kind of scenario?
For example,

option = {
    xAxis: {},
    yAxis: {},
    series: [{
        bar: 'bar',
        encode: {
            x: 0,
            // When there are more than one dimensions specified on y,
            // the first dimension indicates the bar start, and the second 
            // indicates bar end.
            y: [1, 2] 
        },
        data: [
           //               bar start, bar end
            ['11-01',      55,            90],
            ['11-02',      65,           120],
            ['11-03',      75,           60],
            ['11-04',      85,           50]
        ]
    }]
}

100pah on 24 Dec 2019

👀2 👍2

@100pah adding a bar start and bar end feature would be very useful in both a waterfall and floating bar chart I've implemented that needs to account for bars that start as negative but end as positive.