I need to calculate for a ts if the value that I'm working with is an outlier coinsidering the previous 30 values. The data that I'm working with has a dimension of 600 columns by 200000 rows. So I want to use the benefits of data table speed.I need to calculate for a ts if the value that
阅读背景：
R -数据表滚动窗口-自定义功能。
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