# Instrument Data Allotrope Calculated Data Handling

> Sub-skill of instrument-data-allotrope: Calculated Data Handling.

- Skill: `vamseeachanta/instrument-data-allotrope-calculated-data-handling` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/instrument-data-allotrope-calculated-data-handling`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/instrument-data-allotrope-calculated-data-handling/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Research & Search
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/instrument-data-allotrope-calculated-data-handling

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# Calculated Data Handling

## Calculated Data Handling


**IMPORTANT:** Separate raw measurements from calculated/derived values.

- **Raw data** -> `measurement-document` (direct instrument readings)
- **Calculated data** -> `calculated-data-aggregate-document` (derived values)

Calculated values MUST include traceability via `data-source-aggregate-document`:

```json
"calculated-data-aggregate-document": {
  "calculated-data-document": [{
    "calculated-data-identifier": "SAMPLE_B1_DIN_001",
    "calculated-data-name": "DNA integrity number",
    "calculated-result": {"value": 9.5, "unit": "(unitless)"},
    "data-source-aggregate-document": {
      "data-source-document": [{
        "data-source-identifier": "SAMPLE_B1_MEASUREMENT",
        "data-source-feature": "electrophoresis trace"
      }]
    }
  }]
}
```

**Common calculated fields by instrument type:**
| Instrument | Calculated Fields |
|------------|-------------------|
| Cell counter | Viability %, cell density dilution-adjusted values |
| Spectrophotometer | Concentration (from absorbance), 260/280 ratio |
| Plate reader | Concentrations from standard curve, %CV |
| Electrophoresis | DIN/RIN, region concentrations, average sizes |
| qPCR | Relative quantities, fold change |

See `references/field_classification_guide.md` for detailed guidance on raw vs. calculated classification.