Package: levelSets
Version: 0.8.2
Date: 2026-06-15
Title: Ray-Based Mapping and Visualization of Level Sets (Excursion
        Sets)
Authors@R: c(person("Richard", "Raubertas", role=c("aut", "cre"), 
                    email="rrprf@emvt.net"))
Author: Richard Raubertas [aut, cre]
Maintainer: Richard Raubertas <rrprf@emvt.net>
License: GPL (>= 3)
Depends: R (>= 3.5.0)
Imports: graphics, stats, tools, utils, proxy, withr
Suggests: ggplot2, randomForest, palmerpenguins, knitr, rmarkdown
Description: An (upper) level set of a function is the set of inputs
        for which the function value is at or above a specified
        threshold.  (Also called an excursion set).  Applications of
        level sets include confidence or credible regions for
        parameters of statistical models, where the function is the
        likelihood or posterior density; regions where classification
        rules assign high probability to a given class; and scientific
        or engineering models where one is interested in input regions
        for which model output is above a threshold.  This package maps
        out the boundary of a level set by finding its intersections
        with collections of 1-dimensional rays, generalizing a proposal
        by Kim and Lindsay (Statistica Sinica 21:923-948, 2011).  Tools
        are provided to generate rays, find intersections, and
        visualize results.  The package makes few assumptions about the
        studied function: it may be discontinuous, it may have a
        complicated feasible region, and the target level set may be
        non-convex or have multiple, disconnected parts.  Vignettes
        describe package usage and show examples with two to five input
        space dimensions.
LazyData: yes
VignetteBuilder: knitr, rmarkdown
NeedsCompilation: no
Packaged: 2026-07-23 08:07:52 UTC; root
Repository: https://rrprf.r-universe.dev
Date/Publication: 2026-06-22 18:31:58 UTC
RemoteUrl: https://github.com/cran/levelSets
RemoteRef: HEAD
RemoteSha: f3e33bc9cec5f765c90691d315514f2804b8dc45