content/flux/v0/stdlib/universe/cumulativesum.md
cumulativeSum() computes a running sum for non-null records in a table.
The output table schema will be the same as the input table.
(<-tables: stream[A], ?columns: [string]) => stream[B] where A: Record, B: Record
{{% caption %}} For more information, see Function type signatures. {{% /caption %}}
List of columns to operate on. Default is ["_value"].
Input data. Default is piped-forward data (<-).
import "sampledata"
sampledata.int()
|> cumulativeSum()
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| _time | _value | *tag |
|---|---|---|
| 2021-01-01T00:00:00Z | -2 | t1 |
| 2021-01-01T00:00:10Z | 10 | t1 |
| 2021-01-01T00:00:20Z | 7 | t1 |
| 2021-01-01T00:00:30Z | 17 | t1 |
| 2021-01-01T00:00:40Z | 15 | t1 |
| 2021-01-01T00:00:50Z | 4 | t1 |
| _time | _value | *tag |
|---|---|---|
| 2021-01-01T00:00:00Z | 19 | t2 |
| 2021-01-01T00:00:10Z | 4 | t2 |
| 2021-01-01T00:00:20Z | -3 | t2 |
| 2021-01-01T00:00:30Z | 19 | t2 |
| 2021-01-01T00:00:40Z | 13 | t2 |
| 2021-01-01T00:00:50Z | 1 | t2 |
| _time | _value | *tag |
|---|---|---|
| 2021-01-01T00:00:00Z | -2 | t1 |
| 2021-01-01T00:00:10Z | 8 | t1 |
| 2021-01-01T00:00:20Z | 15 | t1 |
| 2021-01-01T00:00:30Z | 32 | t1 |
| 2021-01-01T00:00:40Z | 47 | t1 |
| 2021-01-01T00:00:50Z | 51 | t1 |
| _time | _value | *tag |
|---|---|---|
| 2021-01-01T00:00:00Z | 19 | t2 |
| 2021-01-01T00:00:10Z | 23 | t2 |
| 2021-01-01T00:00:20Z | 20 | t2 |
| 2021-01-01T00:00:30Z | 39 | t2 |
| 2021-01-01T00:00:40Z | 52 | t2 |
| 2021-01-01T00:00:50Z | 53 | t2 |
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