谷歌图表显示图例中的空白项目 [英] Google Charts Show Empty Items in Legend

问题描述

在Google Charts中使用饼图时，它似乎忽略值为零的项目。我很想让这些项目出现在图例中，即使它们的值为零，以便用户知道这是问题的可能答案。有没有一种方法可以在图例中显示零值项目？

解决方案

将切片可见性阈值设置为0解决它对我来说。注意最后一个选项 sliceVisibilityThreshold 。

  var chart = new google.visualization .PieChart（的document.getElementById（ 'chart_div'））; 
 chart.draw（data，{
 title：'我昨晚吃了多少比萨'，
 width：400，
 height：300，
 sliceVisibilityThreshold：0 
}）; 
  

（取自示例饼图）。

默认情况下，阈值设置为1/720，这意味着（从文档）：

切片相关部分，低于此值将不会单独显示。
没有超过此阈值的所有切片将合并为一个切片，其大小为所有大小的总和
。缺省值不是单独显示小于
半度的切片。

When working with the pie chart in Google Charts it seems to ignore items with a value of zero. I would really like to get these items to show up in the legend even though their value is zero so that the users knows that it was a possible answer to the question. Is there a way to have a zero value item still show up in the legend?

解决方案

Setting the slice visibility threshold to 0 solved it for me. Notice the last option sliceVisibilityThreshold.

var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(data, {
    title:'How Much Pizza I Ate Last Night',
    width:400,
    height:300,
    sliceVisibilityThreshold:0
});

(taken from the sample pie chart).

By default, the threshold is set to 1/720, which means (from the docs):

The slice relative part, below which a slice will not show individually. All slices that have not passed this threshold will be combined to a single slice, whose size is the sum of all their sizes. Default is not to show individually any slice which is smaller than half a degree.

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