inst/validation/README.md

In movecost: Calculation of Slope-Dependant Accumulated Cost Surface, Least-Cost Paths, Least-Cost Corridors, Least-Cost Networks Related to Human Movement Across the Landscape

Validation materials

• compare_v23.R - cross-version regression check. For every cost function it builds the accumulated cost surface with the movecost 2.x core (replicated verbatim through gdistance) and with the movecost 3.0 core (mc_surface() + mc_accum()), on the bundled volc DTM, and prints the maximum relative difference with a MATCH / DIFFERS verdict. Unchanged functions agree to floating-point precision (~1e-15); the deliberately corrected functions (ks, ma, pcf, and p/vl when N != 1) show a known, explainable difference. Needs only gdistance + raster + sp installed. Run with: source(system.file("validation", "compare_v23.R", package = "movecost"))

• validate_core.py - independent Python/SciPy re-implementation of the movecost 3.0 computational core, validating it against analytic results, internal consistency laws, and a replica of the 2.x gdistance procedure on random rugged DTMs (developer material; excluded from the built package via .Rbuildignore; requires numpy + scipy).

• The package's testthat suite (tests/testthat/) mirrors the analytic and consistency checks in R; run it with devtools::test().

movecost documentation built on June 16, 2026, 1:06 a.m.