希望折线图能支持离群点的绘制 #3820

• I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

某些极值数据(离群点),会导致y轴范围很大, 而正常数据只显示在某一个区域, 不利于观测正常数据,希望离群点能单独绘制在一个图标上方

What does the proposed API look like?

随便

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