Description
Compute an explicit research contact-cell share without plantar-risk interpretation.
Foot and footwear research uses geometric dimensions, contact cells, forces, and measurement records. A length margin, normalized difference, or contact share has a specific measurement basis and can omit important three-dimensional or sensor effects. Arithmetic on supplied observations is separate from a validated clinical assessment.
Compute an explicit research contact-cell share without plantar-risk interpretation.
When to use this tool
Use Plantar Contact Share when you have supplied foot, footwear, bench, or recording data and need this measurement or record-support calculation.
How to use the tool and how it works
- Enter contactCells, assessableCells. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read share, defined. Inspect defined before interpreting the associated values.
Require nonnegative integer assessableCells and contactCells no greater than assessableCells. Return share=contactCells/assessableCells when positive, otherwise zero with defined=false.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| contactCells | Contact Cells | Required. Safe integer; minimum 0. |
| assessableCells | Assessable Cells | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| share | Dimensionless share under the stated base; not a percentage numeral. | Required. Finite number. |
| defined | Whether the associated ratio is defined; inspect before using a zero placeholder. | Required. Boolean. |
{
"input": {
"contactCells": 20,
"assessableCells": 100
},
"output": {
"share": 0.2,
"defined": true
}
}Limitations and assumptions
- This is a cell-count share rather than an area-weighted share. The zero on an empty assessment is a placeholder, not evidence of absent plantar contact.
- 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. Signed zero is exported as zero.
Alternative or Complementary methods
Use a documented measurement protocol with calibrated equipment and appropriate geometric or contact models. Broader interpretation requires assessment of the underlying observations beyond one length, ratio, or support flag.
References
Similar or alternative tools
- Foot Task Contact Time Swing Share
Require nonnegative contactSeconds and swingSeconds with positive sum and doubleContactSeconds within contactSeconds.
- Plantar Grid Support Share
Sum contact cells into contactArea and those also valid and calibrated into supportedArea; return share=supportedArea/contactArea when positive, otherwise zero with defined=false.