Description
Return cumulative as that sum, fraction = cumulative/expectedTotal and remaining = expectedTotal-cumulative.
Entomological counts can refer to individuals, hosts, marker grains or a known cohort. Ratios are meaningful only when numerator and denominator describe compatible observations; an absent denominator differs from an observed zero proportion.
Return cumulative as that sum, fraction = cumulative/expectedTotal and remaining = expectedTotal-cumulative.
When to use this tool
Use Insect Emergence Cumulative One Day Term when checking a supplied count ratio or cohort balance.
How to use the tool and how it works
- Enter previousCumulative, today, expectedTotal. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read cumulative, fraction, remaining. Use the output convention below.
Require positive whole expectedTotal and nonnegative whole previousCumulative and today with their sum <= expectedTotal. Return cumulative as that sum, fraction = cumulative/expectedTotal and remaining = expectedTotal-cumulative.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| previousCumulative | Previous Cumulative | Required. Safe integer; minimum 0. |
| today | Today | Required. Safe integer; minimum 0. |
| expectedTotal | Expected Total | Required. Safe integer; minimum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| cumulative | Cumulative | Required. Safe integer. |
| fraction | Dimensionless fraction on the stated denominator basis, not multiplied by 100. | Required. Finite number. |
| remaining | Remaining | Required. Safe integer. |
{
"input": {
"previousCumulative": 20,
"today": 10,
"expectedTotal": 100
},
"output": {
"cumulative": 30,
"fraction": 0.3,
"remaining": 70
}
}Limitations and assumptions
- The expected cohort total is supplied, not estimated. Duplicate emergence records, mortality, recruitment and incomplete observation are not detected.
- 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 appropriate counting, subsampling and recovery methods for inference beyond these supplied counts.
References
Similar or alternative tools
- Insect Count Subsample Share
share = subsampleCount/totalCount when totalCount > 0; otherwise return share = 0 and defined = false.
- Parasitoid Emergence Host Count Share
hostEmergenceFraction = emergedHosts/exposedHosts; parasitoidsPerEmergingHost = parasitoids/emergedHosts.