Description
Return expression-domain width relative to an enclosing axis.
Morphogen models distinguish amount flow, concentration and spatial decay. A steady exponential profile or local flux balance requires explicit geometry, reaction assumptions and compatible units; it is not a fitted mechanism.
Return expression-domain width relative to an enclosing axis.
When to use this tool
Use Developmental Expression Domain Width Share when checking a supplied morphogen-domain or balance term.
How to use the tool and how it works
- Enter domainStart, domainEnd, axisStart, axisEnd. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read width, axisFraction. Use the output convention below.
Return expression-domain width relative to an enclosing axis. Require axisEnd > axisStart and axisStart <= domainStart <= domainEnd <= axisEnd; axisFraction = domain width/axis length.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| domainStart | Domain Start | Required. Finite number. |
| domainEnd | Domain End | Required. Finite number. |
| axisStart | Axis Start | Required. Finite number. |
| axisEnd | Axis End | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| width | Extent on the stated coordinate or temporal basis. | Required. Finite number. |
| axisFraction | Axis Fraction | Required. Finite number. |
{
"input": {
"domainStart": 2,
"domainEnd": 6,
"axisStart": 0,
"axisEnd": 10
},
"output": {
"width": 4,
"axisFraction": 0.4
}
}Limitations and assumptions
- Zero domain width is accepted; boundaries are supplied rather than detected from expression data.
- 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 suitable concentration measurements, boundary conditions and a full transport/reaction model when inferring developmental mechanisms.
References
Similar or alternative tools
- Developmental Stage Uncertainty Bracket
Return a supplied stage-time bracket and inclusive reference membership.
- Morphogen Domain Edge Token
Classify position within a supplied closed-or-open domain.