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