Sherd Weight Total Per Lot Calculator

Actual tare-corrected sherd weight grouped by exact lot ID, no estimated vessel count or generic inventory record replication. Caller independently establishes sample/context/calibration applicability; not definitive chronology, provenance, taxonomy, disease or human identity.

Description

Net sherd mass subtracts matched container tares before grouping lots.

Net sherd mass subtracts matched container tares before grouping lots.^[1]

Grouping repeated lot identifiers preserves a different structure from treating every weighed sample as a separate lot. Use Sherd Weight Total Per Lot Calculator to evaluate the supplied inputs under the model explained below.

When to use Sherd Weight Total Per Lot Calculator

Use Sherd Weight Total Per Lot Calculator to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.

How to use Sherd Weight Total Per Lot Calculator and understand its results

Establish the units, measurement scope and model assumptions before entering values.
Enter Caller lot ids, Observed sherd gross masses g, Independently measured lot tares g using the field table and validation rules below, then run the tool.
Read Distinct lot ids, Net sherd mass per lot g, Total net sherd mass g; interpret the units, signs, ordering and unknown-value placeholders described below.
Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.

Input field	Meaning	Value type	Requirement
callerLotIds	Caller lot ids	array of string	Required; constraints below
observedSherdGrossMassesG	Observed sherd gross masses g	array of number	Required; constraints below
independentlyMeasuredLotTaresG	Independently measured lot tares g	array of number	Required; constraints below

Enter nonempty aligned lot IDs, nonnegative gross masses and nonnegative matched tares in g. Every gross−tare must be nonnegative. Group exact lot IDs, returning distinct IDs and their net sums in first-appearance order plus the total. Repeated IDs are allowed; this compute path does not require nonblank or unique individual IDs. No assemblage completeness or independent tare measurement is verified.

net[i]=grossG[i]−tareG[i]; lotMass=Σnet for exact lot ID

Use the field order, units and branch conditions described above.

Output field	Meaning	Value type
distinctLotIds	Distinct lot ids	array of string
netSherdMassPerLotG	Net sherd mass per lot g	array of number
totalNetSherdMassG	Total net sherd mass g	number

json

{
  "input": {
    "callerLotIds": [
      "a",
      "b",
      "a"
    ],
    "observedSherdGrossMassesG": [
      10,
      20,
      30
    ],
    "independentlyMeasuredLotTaresG": [
      1,
      2,
      3
    ]
  },
  "output": {
    "distinctLotIds": [
      "a",
      "b"
    ],
    "netSherdMassPerLotG": [
      36,
      18
    ],
    "totalNetSherdMassG": 54
  }
}

Limitations and assumptions

Grouping repeated lot identifiers preserves a different structure from treating every weighed sample as a separate lot. Apply the exact scope and assumptions explained above.

All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.

Alternative or Complementary methods

Use Knapping Floor Refit Cluster Density Calculator for a related task: Refit-cluster density combines independently assigned clusters with a surveyed floor area.

Use Flake Scar Density Core Calculator for a related task: Core scar density relates counts to matched exposed surface areas.

References

Sherd Weight Total Per Lot Calculator — tool.io

Similar or alternative tools

Knapping Floor Refit Cluster Density Calculator
Refit-cluster density combines independently assigned clusters with a surveyed floor area.
Flake Scar Density Core Calculator
Core scar density relates counts to matched exposed surface areas.