NEWS.md

In rumenGP: Rumen Gas Production Modeling, Comparison, and Visualization

rumenGP 0.1.0

Initial release

rumenGP provides tools for importing, processing, visualizing, fitting, comparing, and interpreting in vitro rumen gas production data.

Data Import and Processing

• Added support for importing ANKOM RF data.
• Added metadata import and validation workflows.
• Added timestamp parsing utilities.
• Added pressure-to-volume conversion using the ideal gas law.
• Added standardized rumen_gp objects.
• Added quality-control and data-validation functions.
• Added tools for excluding problematic bottles while preserving exclusion records.

Kinetic Models

Implemented the following gas production models:

• Brody
• Dual Logistic
• EXP0
• EXPL
• Gompertz
• Groot
• LE0
• LEL
• Logistic
• Mitscherlich
• Michaelis-Menten
• Orskov and McDonald

Custom Models

• Added fit_custom() for user-defined nonlinear models.
• Supports custom formulas.
• Supports custom starting values.
• Supports parameter bounds.
• Integrates with plotting and model-comparison tools.

Model Comparison

• Added model performance comparison tools.
• Added model ranking functions.
• Added treatment-level model comparison.
• Added treatment-level model ranking.
• Added best-model selection by treatment.
• Added model win frequency summaries.

Visualization

• Added raw gas production plots.
• Added fitted curve visualization.
• Added treatment mean visualizations.
• Added residual diagnostics.
• Added model comparison visualizations.
• Added model ranking visualizations.
• Added dual-pool decomposition plots.

Documentation

• Added extensive function documentation.
• Added parameter interpretation guidance.
• Added executable examples throughout the package.

• Added five package vignettes:

• Getting Started

• Importing Data
• Custom Models
• Model Equations
• Interpreting Models

Website

• Added a pkgdown website.
• Added searchable reference documentation.
• Added rendered examples and figures.
• Added article and vignette integration.

Quality Assurance

• Achieved clean R CMD check:

• 0 errors

• 0 warnings
• 0 notes

rumenGP documentation built on Oct. 2, 2026, 5:09 p.m.