Crate minuit2 

minuit2 — Pure Rust port of CERN Minuit2 parameter optimization engine.

Quick Start — Migrad (recommended)

use minuit2::MnMigrad;

let result = MnMigrad::new()
    .add("x", 0.0, 0.1)
    .add("y", 0.0, 0.1)
    .minimize(&|p: &[f64]| {
        (1.0 - p[0]).powi(2) + 100.0 * (p[1] - p[0] * p[0]).powi(2)
    });

println!("{result}");

Simplex (derivative-free)

use minuit2::MnSimplex;

let result = MnSimplex::new()
    .add("x", 0.0, 0.1)
    .add("y", 0.0, 0.1)
    .minimize(&|p: &[f64]| {
        (1.0 - p[0]).powi(2) + 100.0 * (p[1] - p[0] * p[0]).powi(2)
    });

println!("{result}");

Re-exports

pub use contours::MnContours;

pub use fcn::FCN;

pub use fcn::FCNGradient;

pub use hesse::MnHesse;

pub use migrad::MnMigrad;

pub use minimize::MnMinimize;

pub use minimum::FunctionMinimum;

pub use minos::MnMinos;

pub use parameter::MinuitParameter;

pub use precision::MnMachinePrecision;

pub use scan::MnScan;

pub use simplex::MnSimplex;

pub use strategy::MnStrategy;

pub use user_covariance::MnUserCovariance;

pub use user_parameter_state::MnUserParameterState;

pub use user_parameters::MnUserParameters;

pub use user_transformation::MnUserTransformation;

Modules

application

Shared minimization logic: default maxfcn calculation.

contours

MnContours: 2D confidence contours.

covariance_squeeze

Remove a parameter from a covariance/Hessian matrix.

fcn

global_cc

Global correlation coefficients from a covariance matrix.

gradient

Gradient calculators.

hesse

MnHesse: accurate error analysis via full Hessian computation.

linesearch

Parabolic line search along a step direction.

migrad

Public Migrad (variable-metric) minimizer API.

minimize

Public Minimize minimizer API (hybrid Simplex + Migrad).

minimum

Top-level minimization result.

minos

MnMinos: asymmetric profile-likelihood errors.

mn_fcn

Call-counting FCN wrapper that operates in internal parameter space.

parabola

Quadratic parabola utilities for line search.

parameter

posdef

Force a symmetric matrix to be positive-definite.

precision

print

Display implementations for minimization results.

scan

MnScan / MnParameterScan: 1D parameter scan.

simplex

Public Simplex minimizer API.

strategy

transform

Parameter transformations between external (user) and internal (optimizer) spaces.

user_covariance

user_parameter_state

Complete parameter state: parameters + function value + EDM + nfcn + covariance.

user_parameters

High-level parameter collection with name-based lookup.

user_transformation

External / internal parameter mapping.

Constants

REFERENCE_MINUIT2_COMMIT

Pinned ROOT commit for the baseline release tag.

REFERENCE_MINUIT2_REPOSITORY

Canonical C++ upstream repository for this port.

REFERENCE_MINUIT2_SUBTREE

Canonical C++ upstream subtree for Minuit2.

REFERENCE_MINUIT2_TAG

Target ROOT release baseline for functionality parity work.