Description
Identify empty and below-minimum group-count folds.
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.
Identify empty and below-minimum group-count folds.
When to use this tool
Use Split Group Empty Fold Budget when checking an explicit feature-time or split-membership condition.
How to use the tool and how it works
- Enter groupCounts, minimumGroups. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read emptyIndices, insufficientIndices. Use the output convention below.
Identify empty and below-minimum group-count folds. Require nonnegative whole minimumGroups and nonnegative groupCounts; return zero-valued indexes and indexes whose count < minimum.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| groupCounts | Group Counts | Required. Array of safe integer; maximum items 256. |
| minimumGroups | Minimum Groups | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| emptyIndices | Empty Indices | Required. Array of safe integer; maximum items 256. |
| insufficientIndices | Insufficient Indices | Required. Array of safe integer; maximum items 256. |
{
"input": {
"groupCounts": [
3,
0,
1
],
"minimumGroups": 2
},
"output": {
"emptyIndices": [
1
],
"insufficientIndices": [
1,
2
]
}
}Limitations and assumptions
- The counts are supplied, not reconstructed; minimumGroups zero makes empty folds sufficient under that threshold.
- 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
- Fold Group Membership Bit
Check literal membership of a group in a supplied fold-group list.
- Split Entity Support Gap
Compare distinct entity support across two split labels.