CumSum / Computation Layer

Calculate the running sum of values in a column. Similar to pandas cumsum() or running total in SQL.

For each position i: $y_{i} = j = 1 \sum i x_{j}$

Applications:

Running totals
Progressive summation
Accumulated values

Note: Ignores null values. Direction controlled by Reverse parameter.

Table

Transforms

[, ...]

Select

column

The column (Select) for cumulative sum. Example with [1, 2, 3, 4]:

Forward: [1, 3, 6, 10]
Reverse: [10, 9, 7, 4]

Reverse

bool

false

Controls summation direction:

false: sum from top to bottom
true: sum from bottom to top

Name for the new column. If not provided, the system generates a unique name. If AsColumn matches an existing column, the existing column is replaced. The name should follow valid column naming conventions.