Description
Return a row-lag source index and availability flag.
Model validation depends on when information became available and how records or entities enter splits. A timestamp inequality or group overlap count can identify one local issue without proving absence of every form of leakage.
Return a row-lag source index and availability flag.
When to use this tool
Use Feature Lag Calendar Row Offset when checking an explicit feature-time or split-membership condition.
How to use the tool and how it works
- Enter row, lag, rowCount. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read sourceRow, available. Inspect available before interpreting the associated values.
Return a row-lag source index and availability flag. Require positive whole rowCount and valid row; sourceRow = row-lag, available tests whether it remains in [0,rowCount).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| row | Row | Required. Safe integer; minimum 0. |
| lag | Signed whole row lag; a negative value points to a later row and is accepted. | Required. Safe integer. |
| rowCount | Row Count | Required. Safe integer; minimum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| sourceRow | Source Row | Required. Safe integer. |
| available | Whether sourceRow lies in [0,rowCount); this is not a causal-availability check. | Required. Boolean. |
{
"input": {
"row": 5,
"lag": 2,
"rowCount": 10
},
"output": {
"sourceRow": 3,
"available": true
}
}Limitations and assumptions
- This is row arithmetic, not calendar lagging; negative lag can reference a future row.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use a complete data-provenance and validation-design review, including label horizons, entity dependence and preprocessing fit scope.
References
Similar or alternative tools
- Feature Availability Lag Gap
Compare feature publication lag with a supplied allowance.
- Feature Label Time Window Overlap
Return positive-duration overlap between feature and label windows.