earthUI 0.1.3

Locale & Regional Settings

Country-based locale system with 31 country presets controlling CSV separator, decimal mark, thousands separator, date format ordering, and paper size.
Country dropdown with individual override dropdowns for Paper, CSV sep, Decimal, and Date format.
Global locale defaults saved via “Save as my default” (SQLite persistence), independent of per-file settings.
Number formatting on plot axes and slope labels adapts to locale (e.g., German uses period thousands, Finnish uses space, Swiss uses apostrophe).
CSV import uses locale-aware separator and decimal mark.
PDF reports respect locale paper size (Letter or A4).
Date parsing tries locale-preferred format order first (MDY for US, DMY for Europe, YMD for Sweden/Japan).
Currency symbols removed from all outputs — earthUI is now currency-agnostic.

New Sales Comparison Grid output for appraisal workflows — generates multi-sheet Excel workbooks with subject and up to 30 comps (3 per sheet).
Auto-recommended comp selection based on gross adjustment percentage (< 25%), sorted by gross adjustment.
Sale Price / Concessions / Net SP row with formula-based Net SP.
Grouped rows for Location (longitude, latitude, area), Site Size (lot_size, site_dimensions), and Age (actual_age, effective_age) with combined value contributions.
CQA|Residual row with formula-based remaining residual that auto-decreases as the appraiser fills in residual feature breakdowns.
Adjusted Sale Price formula: Net SP + all adjustments above Total VC row.
Sheet protection with locked formulas and data cells; unlocked residual feature input cells for appraiser entry.
Haversine-based subject proximity calculation for each comp.

Added new special column types: dom, concessions, actual_age, effective_age, lot_size, site_dimensions, area.
Special type badges displayed next to variable names in predictor settings.
Single-assignment enforcement: only one column per special type (except display_only which allows multiple).

Ranking columns (residual_sf, cqa_sf, residual, cqa) moved to leftmost position in the Step 6 download for easier CQA evaluation.
Excel number formatting: residual_sf as currency (2 dp), residual as currency (0 dp), cqa_sf and cqa as numeric (2 dp).

Cross-validated R-squared now uses model$cv.rsq directly instead of parsing cv.rsq.tab.

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.

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().

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.

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.
Slope labels scaled to axis range (/0.001 for small-range, /unit for large-range variables).

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