Description
Calculate branch change per elapsed generation under a supplied calibration.
Evolutionary summaries depend on sampled sequences/populations, reference states, ploidy, time units and stochastic assumptions. A mixture expectation differs from a drift simulation, and a callable-allele denominator differs from an individual count. Labels and local tree conditions do not reconstruct ancestry or establish a biological mechanism.
Calculate branch change per elapsed generation under a supplied calibration.
When to use this tool
Use Evolutionary Rate Calibration Ratio when checking the stated evolutionary record, reference, expectation or scale convention.
How to use the tool and how it works
- Enter branchSubstitutionsPerSite, elapsedGenerations. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read substitutionsPerSitePerGeneration. Use the output convention below.
Require branchSubstitutionsPerSite>=0 and elapsedGenerations>0. Divide branch change by elapsed generations.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| branchSubstitutionsPerSite | Branch Substitutions Per Site | Required. Finite number; minimum 0. |
| elapsedGenerations | Elapsed Generations | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| substitutionsPerSitePerGeneration | Substitutions Per Site Per Generation | Required. Finite number. |
{
"input": {
"branchSubstitutionsPerSite": 0.02,
"elapsedGenerations": 1000
},
"output": {
"substitutionsPerSitePerGeneration": 0.00002
}
}Limitations and assumptions
- The denominator may be fractional; the tool does not infer branch length, mutation rate, a molecular clock or calendar-time conversion.
- 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 verified samples/references and appropriate complete phylogenetic, population-genetic or statistical models for actual biological inference and uncertainty.
References
Similar or alternative tools
- Sequence Divergence Time Unit Pair
Record the time-unit convention attached to sequence divergence.
- Allele Trajectory Time Origin Offset
Measure a signed allele-trajectory time offset from its supplied origin.