google-visualization - 谷歌图表显示图例中的空项目

Question

在 Google Charts 中使用饼图时，它似乎忽略了值为零的项目。我真的很想让这些项目显示在图例中，即使它们的值为零，以便用户知道这是问题的可能答案。有没有办法让零值项目仍然显示在图例中？

Answer 1

将切片可见性阈值设置为 0 为我解决了这个问题。注意最后一个选项 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
});

(取自示例饼图)。

默认情况下，阈值设置为 1/720，这意味着(来自文档):

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.