Description
Return score=(jointPresent+jointAbsent)/(jointPresent+jointAbsent+2*disagreements).
A similarity term depends on the comparison universe, missing-value policy, treatment of repeated features, and normalization. A score can also have a caller-selected value when its mathematical denominator vanishes. Those conventions matter before interpreting a threshold or comparing methods.
Return score=(jointPresent+jointAbsent)/(jointPresent+jointAbsent+2*disagreements).
When to use this tool
Use Rogers Tanimoto One Disagreement Term when you need this particular comparison term, normalization, domain condition, or empty-result policy in a larger matching workflow.
How to use the tool and how it works
- Enter jointPresent, jointAbsent, disagreements. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read score. Use the output convention below.
Return score=(jointPresent+jointAbsent)/(jointPresent+jointAbsent+2*disagreements). Require nonnegative integer counts and a positive denominator.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| jointPresent | Joint Present | Required. Safe integer. |
| jointAbsent | Joint Absent | Required. Safe integer. |
| disagreements | Disagreements | Required. Safe integer. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| score | Score | Required. Finite number. |
{
"input": {
"jointPresent": 3,
"jointAbsent": 5,
"disagreements": 2
},
"output": {
"score": 0.6666666666666666
}
}Limitations and assumptions
- Disagreements receive double denominator weight under this Rogers-Tanimoto convention. Counts are supplied, without a contingency-table reconstruction, feature validation, or semantic match assessment.
- The field tables state structural bounds; the mechanics also specify cross-field constraints. Malformed inputs and unsupported domains cause errors. A successful false flag, empty branch value, or zero placeholder has the meaning stated above and is distinct from an input error.
- 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. Signed zero is exported as zero.
Alternative or Complementary methods
Compare methods only after aligning feature definitions, missingness, empty policies, multiplicities, and normalizers. Use a complete comparison when the tool returns only one contribution or count check.
References
Similar or alternative tools
- Tanimoto Binary Dot Norm Identity
Calculate union=firstOnes+secondOnes-dot and score=dot/union after feasible nonnegative integer binary-count checks and a positive union.
- Containment Score Direction Reversal Gap
Calculate firstContainment=intersection/firstSize and secondContainment=intersection/secondSize, then gap=firstContainment-secondContainment.