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Posted to commits@echarts.apache.org by GitBox <gi...@apache.org> on 2020/05/21 03:31:51 UTC

[GitHub] [incubator-echarts] huangzigeng opened a new issue #12677: 饼图-传入数据后 是否可以返回每个数据的百分比

huangzigeng opened a new issue #12677:
URL: https://github.com/apache/incubator-echarts/issues/12677


   饼图中  传入数据后  每个数据在饼图中都占有一个面积  这个面积是按百分比来的,那么可以在实例中获取到这个百分比不


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[GitHub] [incubator-echarts] plainheart edited a comment on issue #12677: 饼图-传入数据后 是否可以返回每个数据的百分比

Posted by GitBox <gi...@apache.org>.
plainheart edited a comment on issue #12677:
URL: https://github.com/apache/incubator-echarts/issues/12677#issuecomment-631886102


   没有提供直接的API可以获取，不过要是真想获取也能计算得到。
   1、直接拿自己的原始数据，计算百分比。
   2、获取到你想要获取百分比的pie系列实例，根据其`layout`中的`angle`计算出对应角度，再除以`360`可以算出百分比。
   ```js
     var model = chart.getModel();
     // 根据索引获取系列，或者也可以根据名称、类型等获取
     var pieSeries = model.getSeriesByIndex(0); // getSeriesByName/getSeriesByType
     // 传入你想要获取的数据项索引，可以得到该数据项的Layout
     var itemLayout = b.getData().getItemLayout(0);
     // layout中有我们所需的angle数值，这是一个弧度值，可转换为角度除以360计算百分比
     // 或者直接除以 2*Math.PI计算百分比
     var percent = itemLayout.angle / (2 * Math.PI); // 或者180 / Math.PI * itemLayout.angle / 360
   ```


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[GitHub] [incubator-echarts] plainheart commented on issue #12677: 饼图-传入数据后 是否可以返回每个数据的百分比

Posted by GitBox <gi...@apache.org>.
plainheart commented on issue #12677:
URL: https://github.com/apache/incubator-echarts/issues/12677#issuecomment-631886102


   没有提供直接的API可以获取，不过要是真想获取也能计算得到。
   1、直接拿自己的原始数据，计算百分比。
   2、获取到你想要获取百分比的pie系列实例，根据其`layout`中的`angle`计算出对应角度，再除以`360`可以算出百分比。
   ```js
     var model = chart.getModel();
     // 根据索引获取系列，或者也可以根据名称、类型等获取
     var pieSeries = model.getSeriesByIndex(0); // getSeriesByName/getSeriesByType
     // 传入你想要获取的数据项索引，可以得到该数据项的Layout
     var itemLayout = b.getData().getItemLayout(0);
     // layout中有我们所需的angle数值，这是一个弧度值，可转换为角度除以360计算百分比
     // 或者直接除以 2*Math.PI计算百分比
     var percent = itemLayout.angle / (2 * Math.PI); // 或者180 / Math.PI * itemLayout.angle
   ```


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[GitHub] [incubator-echarts] quillblue commented on issue #12677: 饼图-传入数据后 是否可以返回每个数据的百分比

Posted by GitBox <gi...@apache.org>.
quillblue commented on issue #12677:
URL: https://github.com/apache/incubator-echarts/issues/12677#issuecomment-631885460


   如果需要在饼图上显示百分比，可以通过tooltip或是label的`formatter`中设置[https://echarts.apache.org/examples/zh/editor.html?c=pie-nest](https://echarts.apache.org/examples/zh/editor.html?c=pie-nest) 
   
   如果仅需要获得百分比以供JS中其他计算使用，可以自己实现。
   
   如果是有其他的需求，请通过[Issue Helper](https://ecomfe.github.io/?lang=zh-cn)提交符合要求的Issue。
   


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[GitHub] [incubator-echarts] plainheart edited a comment on issue #12677: 饼图-传入数据后 是否可以返回每个数据的百分比

Posted by GitBox <gi...@apache.org>.
plainheart edited a comment on issue #12677:
URL: https://github.com/apache/incubator-echarts/issues/12677#issuecomment-631886102


   没有提供直接的API可以获取，不过要是真想获取也能计算得到。
   1、直接拿自己的原始数据，计算百分比。
   2、获取到你想要获取百分比的pie系列实例，根据其`layout`中的`angle`计算出对应角度，再除以`360`可以算出百分比。
   ```js
     var model = chart.getModel();
     // 根据索引获取系列，或者也可以根据名称、类型等获取
     var pieSeries = model.getSeriesByIndex(0); // getSeriesByName/getSeriesByType
     // 传入你想要获取的数据项索引，可以得到该数据项的Layout
     var itemLayout = pieSeries.getData().getItemLayout(0);
     // layout中有我们所需的angle数值，这是一个弧度值，可转换为角度除以360计算百分比
     // 或者直接除以 2*Math.PI计算百分比
     var percent = itemLayout.angle / (2 * Math.PI); // 或者180 / Math.PI * itemLayout.angle / 360
   ```


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