Description
Return width, inclusive membership and min(node-min,max-node) as signed nearestBoundGap.
Evolutionary time and branch length are linked through a supplied clock or calibration. A unit conversion, path sum or residual assumes the underlying tree and rate model rather than recovering them from biological data.
Return width, inclusive membership and min(node-min,max-node) as signed nearestBoundGap.
When to use this tool
Use Fossil Calibration Interval Width Term when you need one branch-time, path or calibration term.
How to use the tool and how it works
- Enter minimumAge, maximumAge, nodeAge. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read width, inside, nearestBoundGap. Inspect inside before interpreting the associated values.
Require ordered nonnegative age bounds and nonnegative nodeAge. Return width, inclusive membership and min(node-min,max-node) as signed nearestBoundGap.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| minimumAge | Minimum Age | Required. Finite number; minimum 0. |
| maximumAge | Maximum Age | Required. Finite number. |
| nodeAge | Node Age | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| width | Width or interval span on the measurement basis above. | Required. Finite number. |
| inside | Inside | Required. Boolean. |
| nearestBoundGap | Nearest Bound Gap | Required. Finite number. |
{
"input": {
"minimumAge": 10,
"maximumAge": 20,
"nodeAge": 16
},
"output": {
"width": 10,
"inside": true,
"nearestBoundGap": 4
}
}Limitations and assumptions
- The gap is negative outside the interval. This checks one supplied calibration range, not fossil identity, dating accuracy or a complete phylogenetic calibration.
- 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 phylogenetic or dating method with the relevant sequence, fossil and rate evidence. Verify topology, branch units, calibration assumptions and uncertainty separately.
References
Similar or alternative tools
- Phylogenetic Node Age Branch Residual
Return parentAge-childAge and its residual against branch duration, plus consistentOrder for parent at least child.
- Allele Age Generations Year Crosswalk
Multiply generations by central and symmetric lower/upper generation lengths.