peterwinners opened a new issue #12730:
URL: https://github.com/apache/incubator-echarts/issues/12730
### What problem does this feature solve?
需求：通过formatter或其他方式获取到dataset指定行指定列某一个值。
场景：option中设计与数据完全分离，所有数据存放于dataset中，从后台接口中获取，便于全局数据控制。数据中包含单个统计数字，在页面上展示方式为：“单位数量：1000”，其中数量1000也希望从dataset中获取到，在设计option时，只用填入模板即可
### What does the proposed API look like?
series: {
label: {
// `'{@score}'` 表示 “名为 score” 的维度里的值。
// `'{@[score[0]}'` 表示"名为score"的维度里第一个值。
formatter: '{@score[0]}'
}
}
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