79375182

Date: 2025-01-21 16:38:24
Score: 2
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It seems possible using series_iir function

let rith_table = datatable(id:int, rith_col: dynamic)
[
    1, dynamic([1,2,3,4]),
    2, dynamic([4,8,12]),
    3, dynamic([7,14,21,28])
];
rith_table
| extend cum = series_iir(rith_col,dynamic([1]), dynamic([1,-1]))

This gives the expected result : enter image description here

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Posted by: Kermit754