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Y轴type为对数轴,Y轴数据有时显示格式错误,不再是对数的成了小数 #3161

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hejinenPrivate opened this Issue May 7, 2016 · 8 comments

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@hejinenPrivate

hejinenPrivate commented May 7, 2016

问题简述 (One-line summary)

当Y轴type为对数轴,Y轴数据有时显示格式错误,Y轴上的值显示成了小数。

版本及环境 (Version & Environment)

  • ECharts 版本 (ECharts version):3.0
  • 浏览器类型和版本 (Browser version):所有浏览器,和浏览器无关,我用的是google和火狐
  • 操作系统类型和版本 (OS Version):win7

重现步骤 (Steps to reproduce)

1.打开官网对数轴实例:http://echarts.baidu.com/demo.html#line-log
2.将3条折线的值改成如下这样,问题出现Y轴的值不在是对数的成了小数:

series: [
        {
            name: '3的指数',
            type: 'line',
            data: [120, 132, 101, 134, 90, 230, 210]
        },
        {
            name: '2的指数',
            type: 'line',
            data: [220, 182, 191, 234, 290, 330, 310]
        }
        ,
        {
            name: '2的指数',
            type: 'line',
            data: [320, 332, 301, 334, 390, 330, 320]
        }
    ]

期望结果 (Expected behaviour)

期望无论series的data怎么变化Y轴都是对数轴

可能哪里有问题 (What went wrong)

根据series的data值渲染Y轴刻度值得时候出错。

ECharts配置项 (ECharts option)

option = {
title: {
        text: '对数轴示例',
        left: 'center'
    },
    tooltip: {
        trigger: 'item',
        formatter: '{a} <br/>{b} : {c}'
    },
    legend: {
        left: 'left',
        data: ['2的指数', '3的指数']
    },
    xAxis: {
        type: 'category',
        name: 'x',
        splitLine: {show: false},
        data: ['', '', '', '', '', '', '', '', '']
    },
    grid: {
        left: '3%',
        right: '4%',
        bottom: '3%',
        containLabel: true
    },
    yAxis: {
        type: 'log',
        name: 'y'
    },
    series: [
        {
            name: '3的指数',
            type: 'line',
            data: [120, 132, 101, 134, 90, 230, 210]
        },
        {
            name: '2的指数',
            type: 'line',
            data: [220, 182, 191, 234, 290, 330, 310]
        }
        ,
        {
            name: '2的指数',
            type: 'line',
            data: [320, 332, 301, 334, 390, 330, 320]
        }
    ]
}

其他信息 (Other comments)

image

@Ovilia

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Ovilia May 7, 2016

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如果你的问题的意思,不是“Y轴不是对数而是小数”,而是“如何使Y轴显示整数,那么设置 formatter 即可。

    yAxis: {
        type: 'log',
        name: 'y',
        axisLabel: {
            formatter: function(v) {
                return Math.floor(v);
            }
        }
    },
Contributor

Ovilia commented May 7, 2016

如果你的问题的意思,不是“Y轴不是对数而是小数”,而是“如何使Y轴显示整数,那么设置 formatter 即可。

    yAxis: {
        type: 'log',
        name: 'y',
        axisLabel: {
            formatter: function(v) {
                return Math.floor(v);
            }
        }
    },

@pissang pissang added enhancement bug and removed enhancement labels May 8, 2016

@pissang pissang added this to the 3.1.9 milestone May 9, 2016

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hejinenPrivate commented May 9, 2016

好的 3Q

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hejinenPrivate May 17, 2016

image
出现了个新的问题当Y轴为对数轴时,数据如果有一个为0那么Y轴显示不正常,如图。这个图就是官网实例里面的对数轴实例!只是把其中的一个数据改成了0!!

hejinenPrivate commented May 17, 2016

image
出现了个新的问题当Y轴为对数轴时,数据如果有一个为0那么Y轴显示不正常,如图。这个图就是官网实例里面的对数轴实例!只是把其中的一个数据改成了0!!

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pissang May 17, 2016

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Math.log(0) 看下

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pissang commented May 17, 2016

Math.log(0) 看下

@pissang pissang closed this May 17, 2016

@pissang pissang reopened this May 17, 2016

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hejinenPrivate May 17, 2016

image
是这样么?图像基本对了但是图像上少了一个点。显示不出0点那个值了!

hejinenPrivate commented May 17, 2016

image
是这样么?图像基本对了但是图像上少了一个点。显示不出0点那个值了!

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pissang May 17, 2016

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我的意思是 0 的对数是没有意义的

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pissang commented May 17, 2016

我的意思是 0 的对数是没有意义的

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hejinenPrivate May 17, 2016

对数轴的意思是Y轴的数值是成指数级增长的吧。和数值没有关系吧,现在数据中确实有数据是0 。比如我这个图表要显示最近30天的交易成交额,每天的成交额差距可能很大,有时候是千万,有时候是几百,有时候是几千,有时候为0。这种差距比较大,所以我们需要使用对数轴,在图表上显示出每天的成交额。。。。

hejinenPrivate commented May 17, 2016

对数轴的意思是Y轴的数值是成指数级增长的吧。和数值没有关系吧,现在数据中确实有数据是0 。比如我这个图表要显示最近30天的交易成交额,每天的成交额差距可能很大,有时候是千万,有时候是几百,有时候是几千,有时候为0。这种差距比较大,所以我们需要使用对数轴,在图表上显示出每天的成交额。。。。

@pissang pissang modified the milestones: 3.1.11, 3.1.10 Jun 1, 2016

@pissang pissang closed this Oct 25, 2016

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liubei1 Dec 22, 2016

_ls4xxpnlfhj i0ln5e _ht
可以用这种方式解决,将数值中的0改为一个小数表示(这里数值种最小值为0.1,我用0.01表示0,并用formatter展现为0)

liubei1 commented Dec 22, 2016

_ls4xxpnlfhj i0ln5e _ht
可以用这种方式解决,将数值中的0改为一个小数表示(这里数值种最小值为0.1,我用0.01表示0,并用formatter展现为0)

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