# Iminuit Statistical Fitter

> iminuit statistical fitting skill for physics data analysis with proper error handling and profile likelihood

- Skill: `a5c-ai/iminuit-statistical-fitter` (Agent Skill)
- Install (CLI): `npx skillmds@latest add a5c-ai/iminuit-statistical-fitter`
- Raw SKILL.md: https://api.skillmd.com/api/skills/a5c-ai/iminuit-statistical-fitter/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: a5c-ai (https://skillmd.com/u/a5c-ai)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/a5c-ai/iminuit-statistical-fitter

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# iminuit Statistical Fitter

## Purpose

Provides expert guidance on iminuit for statistical fitting in physics, including proper error estimation and profile likelihood calculations.

## Capabilities

- MINUIT minimization algorithms
- HESSE error matrix calculation
- MINOS asymmetric error estimation
- Profile likelihood computation
- Constrained fitting
- Simultaneous fit orchestration

## Usage Guidelines

1. **Model Definition**: Define cost function for minimization
2. **Minimization**: Run MIGRAD for parameter estimation
3. **Error Analysis**: Use HESSE and MINOS for uncertainties
4. **Profile Likelihood**: Compute profile likelihood for parameters
5. **Simultaneous Fits**: Combine multiple datasets in fits

## Tools/Libraries

- iminuit
- probfit
- zfit