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earthUI 0.1.0

Core

• Shiny GUI for interactive earth (MARS) model building.
• Data import from CSV and Excel files with automatic snake_case column naming.
• Variable configuration with include, factor, and linear-only controls.
• Full exposure of all earth() parameters through the GUI with inline help popovers.
• Cross-validation automatically enabled for interaction and variance models.
• Settings persistence via localStorage across browser sessions.
• Light/dark mode toggle.

Allowed Interactions

• Allowed interaction matrix for constraining degree >= 2 models.
• CSS sticky headers — top row and left column stay visible while scrolling.
• Click variable name to toggle all its interactions (symmetric toggle).
• Allow All / Clear All buttons.

Multivariate Models

• Multi-response model support: select multiple target variables to fit cbind() earth models.
• Per-response equation display, summary metrics, and ANOVA decomposition.
• All plot functions accept response_idx to select which response to visualize.
• Observation weights via the weights parameter in fit_earth().

Model Fitting

• Asynchronous background fitting via callr::r_bg() with real-time trace display and elapsed timer.
• Automatic nfold/ncross adjustment for variance models.
• Synchronous fallback when callr is unavailable.

Visualization

• Variable importance bar charts.
• Per-variable contribution plots with piecewise-linear slope labels and knot markers.
• g-function plots: 1D line, interactive 3D surface (plotly), static 3D perspective (persp()), and filled contour.
• Correlation matrix heatmap.
• Diagnostic plots: residuals vs fitted, Q-Q, actual vs predicted.
• Adaptive axis formatting — 3 decimal places for lat/long-scale data, commas for large values, dollar signs for target.
• Slope labels scaled to axis range (/0.001 for small-range, /unit for large-range variables).

Model Equation

• LaTeX equation with g-function notation rendered via MathJax in the app and native LaTeX in PDF reports.
• Full LaTeX special character escaping (_, $, %, &, #).

Report Export

• Publication-quality HTML, PDF, and Word reports via Quarto.
• Both 3D perspective and contour plots for degree-2 groups in static reports.
• Earth model summary, ANOVA decomposition, and raw earth output sections.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.