{ "_id": "6a3a88d444e65c5976a71aa7", "Package": "levelSets", "Version": "0.8.2", "Date": "2026-06-15", "Title": "Ray-Based Mapping and Visualization of Level Sets (Excursion\nSets)", "Authors@R": "c(person(\"Richard\", \"Raubertas\", role=c(\"aut\", \"cre\"), \nemail=\"rrprf@emvt.net\"))", "Author": "Richard Raubertas [aut, cre]", "Maintainer": "Richard Raubertas ", "License": "GPL (>= 3)", "Description": "An (upper) level set of a function is the set of inputs\nfor which the function value is at or above a specified\nthreshold. (Also called an excursion set). Applications of\nlevel sets include confidence or credible regions for\nparameters of statistical models, where the function is the\nlikelihood or posterior density; regions where classification\nrules assign high probability to a given class; and scientific\nor engineering models where one is interested in input regions\nfor which model output is above a threshold. This package maps\nout the boundary of a level set by finding its intersections\nwith collections of 1-dimensional rays, generalizing a proposal\nby Kim and Lindsay (Statistica Sinica 21:923-948, 2011). Tools\nare provided to generate rays, find intersections, and\nvisualize results. The package makes few assumptions about the\nstudied function: it may be discontinuous, it may have a\ncomplicated feasible region, and the target level set may be\nnon-convex or have multiple, disconnected parts. Vignettes\ndescribe package usage and show examples with two to five input\nspace dimensions.", "LazyData": "yes", "VignetteBuilder": "knitr, rmarkdown", "NeedsCompilation": "no", "Packaged": { "Date": "2026-06-23 13:16:41 UTC", "User": "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", "MD5sum": "7424f0251d3a9efeced7e011725aafd3", "_user": "rrprf", "_type": "src", "_file": "levelSets_0.8.2.tar.gz", "_fileid": "5e28a96ba4a497297f7ffd8413c67391484fe4ac211e66af3a92a63d843b1b45", "_filesize": 5803123, "_sha256": "5e28a96ba4a497297f7ffd8413c67391484fe4ac211e66af3a92a63d843b1b45", "_created": "2026-06-23T13:16:41.000Z", "_published": "2026-06-23T13:23:32.617Z", "_distro": "resolute", "_jobs": [ { "job": 82964539159, "time": 361, "config": "linux-devel-x86_64", "r": "4.7.0", "check": "WARNING", "artifact": 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"Suggests" }, { "package": "knitr", "role": "Suggests" }, { "package": "rmarkdown", "role": "Suggests" } ], "_owner": "cran", "_selfowned": true, "_usedby": 0, "_updates": [ { "week": "2026-26", "n": 1 } ], "_tags": [ { "name": "0.8.2", "date": "2026-06-22" } ], "_stars": 0, "_contributors": [ { "user": "rrprf", "count": 1, "uuid": 75403471 } ], "_userbio": { "uuid": 75403471, "type": "user", "name": "rrprf", "followers": 0 }, "_downloads": { "count": 0, "source": "https://cranlogs.r-pkg.org/downloads/total/last-month/levelSets" }, "_searchresults": 0, "_rbuild": "4.6.0", "_assets": [ "extra/citation.cff", "extra/citation.html", "extra/citation.json", "extra/citation.txt", "extra/contents.json", "extra/levelSets.html", "extra/NEWS.html", "extra/NEWS.txt", "manual.pdf" ], "_realowner": "rrprf", "_cranurl": false, "_releases": [ { "version": "0.8.2", "date": "2026-06-22" } ], "_exports": [ "absTol", "axisRays", "bdryFromRays", "bdrySearch", "boundingRect", "feasBnds", "fnObj", "fnSpec", "hasGrad", "inpDim", "inpLines", "inpLines.default", "inpNames", "inpRays", "inpRays.default", "inpRect", "inpScale", "inpTol", "lsetPkgOpt", "lsetSegs", "lsetSegsCheck", "lsetThresh", "pairs.lsetSegs", "plot.inpRays", "plot.inpRect", "plot.lsetSegs", "plot.respProfiles", "plotSegsList", "posnToCoord", "print.inpLines", "print.respProfiles", "ptCoord", "randomRays", "rayOrigin", "rayPosn1", "rayRect", "rayVec", "rectCorners", "rectRefPt", "rectSize", "respInfo", "respInfo.default", "respProfiles", "respProfiles.fnObj", "respTol", "segBoundingRect", "segInfo", "slicedBdryFromRays", "slicedBdrySearch", "sliceMat", "srchControl", "summary.lsetSegs", "summary.respProfiles", "update.fnObj", "update.inpRays", "update.inpRect" ], "_datasets": [ { "name": "banana_2dEx", "title": "Negative of Rosenbrock's Banana Function in Two Dimensions", "object": "banana_2dEx", "class": [ "list" ], "fields": [], "table": false, "tojson": false }, { "name": "circuitFailure_3dEx", "title": "Example of a 3D Confidence Region as a Level Set", "object": "circuitFailure_3dEx", "class": [ "list" ], "fields": [], "table": false, "tojson": false }, { "name": "dbl_ellipse_2dEx", "title": "Example of a Multi-Part Level Set in a 2D Input Space", "object": "dbl_ellipse_2dEx", "class": [ "list" ], "fields": [], "table": false, "tojson": false }, { "name": "dbl_ellipse_X1bnd_2dEx", "title": "Example of a Multi-Part Level Set in a 2D Input Space", "object": "dbl_ellipse_X1bnd_2dEx", "class": [ "list" ], "fields": [], "table": false, "tojson": false } ], "_help": [ { "page": "absTol", "title": "Absolute (Difference Scale) Tolerance Values", "topics": [ "absTol" ] }, { "page": "axisRays", "title": "Rays Based on the Coordinate Axes of Input Space", "topics": [ "axisRays" ] }, { "page": "banana_2dEx", "title": "Negative of Rosenbrock's Banana Function in Two Dimensions", "topics": [ "banana_2dEx" ] }, { "page": "bdryFromRays", "title": "Intersections of Rays with the Boundary of a Level Set", "topics": [ "bdryFromRays" ] }, { "page": "bdrySearch", "title": "Ray-Based Exploration of the Boundary of a Level Set", "topics": [ "bdrySearch" ] }, { "page": "boundingRect", "title": "Hyper-Rectangle Bounding a Set of Points in Input Space", "topics": [ "boundingRect" ] }, { "page": "circuitFailure_3dEx", "title": "Example of a 3D Confidence Region as a Level Set", "topics": [ "circuitFailure_3dEx" ] }, { "page": "dbl_ellipse_2dEx", "title": "Example of a Multi-Part Level Set in a 2D Input Space", "topics": [ "dbl_ellipse_2dEx", "dbl_ellipse_X1bnd_2dEx" ] }, { "page": "feasBnds", "title": "Box Constraints on a Feasible Region", "topics": [ "feasBnds" ] }, { "page": "fnObj", "title": "Create an Object that Represents a Response Function", "topics": [ "fnObj" ] }, { "page": "fnObj.character", "title": "Create an Object that Represents a Response Function", "topics": [ "fnObj.character" ] }, { "page": "fnObj.fnSpec", "title": "Create an Object that Represents a Response Function", "topics": [ "fnObj.fnSpec" ] }, { "page": "fnSpec", "title": "Input Space and Related Specifications", "topics": [ "fnSpec" ] }, { "page": "hasGrad", "title": "Can a Response Function Calculate Gradient Vectors?", "topics": [ "hasGrad" ] }, { "page": "inpDim", "title": "Number of Dimensions for the Input Space", "topics": [ "inpDim" ] }, { "page": "inpLines", "title": "Lines in Input Space", "topics": [ "inpLines" ] }, { "page": "inpLines.default", "title": "Lines in Input Space", "topics": [ "inpLines.default" ] }, { "page": "inpNames", "title": "Names of the Dimensions of the Input Space", "topics": [ "inpNames" ] }, { "page": "inpRays", "title": "Rays in Input Space", "topics": [ "inpRays" ] }, { "page": "inpRays.default", "title": "Rays in Input Space", "topics": [ "inpRays.default" ] }, { "page": "inpRect", "title": "Hyper-Rectangle in Input Space", "topics": [ "inpRect" ] }, { "page": "inpScale", "title": "Scaling Information for Dimensions of Input Space", "topics": [ "inpScale" ] }, { "page": "inpTol", "title": "Numerical Tolerance Specifications for the Input Space", "topics": [ "inpTol" ] }, { "page": "lsetPkgOpt", "title": "Extract or Set Options for the 'levelSets' Package", "topics": [ "lsetPkgOpt" ] }, { "page": "lsetSegs", "title": "Line Segments in a Level Set of a Response Function", "topics": [ "lsetSegs" ] }, { "page": "lsetSegsCheck", "title": "Check the Validity of Level Set Line Segments", "topics": [ "lsetSegsCheck" ] }, { "page": "lsetThresh", "title": "Response Function Value that Defines a Level Set", "topics": [ "lsetThresh" ] }, { "page": "pairs.lsetSegs", "title": "'pairs' Method for Plotting 'lsetSegs' Objects", "topics": [ "pairs.lsetSegs" ] }, { "page": "plot.inpRays", "title": "Plot Method for 'inpRays' Objects", "topics": [ "plot.inpRays" ] }, { "page": "plot.inpRect", "title": "Plot Method for 'inpRect' Objects", "topics": [ "plot.inpRect" ] }, { "page": "plot.lsetSegs", "title": "Plot Method for 'lsetSegs' Objects", "topics": [ "plot.lsetSegs" ] }, { "page": "plot.respProfiles", "title": "Plot Profiles of a Response Function along Lines/Rays", "topics": [ "plot.respProfiles" ] }, { "page": "plotSegsList", "title": "Plot Sets of Level Set Segments in Separate Panels", "topics": [ "plotSegsList" ] }, { "page": "posnToCoord", "title": "Convert Positions on Lines or Rays to Point Coordinates", "topics": [ "posnToCoord" ] }, { "page": "print.inpLines", "title": "'print' Method for 'inpLines' and 'inpRays' Objects", "topics": [ "print.inpLines" ] }, { "page": "print.respProfiles", "title": "'print' Method for 'respProfiles' and 'lsetSegs' Objects", "topics": [ "print.respProfiles" ] }, { "page": "ptCoord", "title": "Extract a Matrix of Point Coordinates", "topics": [ "ptCoord" ] }, { "page": "randomRays", "title": "Generate Rays in Input Space", "topics": [ "randomRays" ] }, { "page": "rayOrigin", "title": "Coordinates of the Origin of a Set of Rays in Input Space", "topics": [ "rayOrigin" ] }, { "page": 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"respProfiles" ] }, { "page": "respProfiles.fnObj", "title": "Profiles of a Response Function along Lines or Rays", "topics": [ "respProfiles.fnObj" ] }, { "page": "respTol", "title": "Numerical Tolerance Specification for Response Values", "topics": [ "respTol" ] }, { "page": "segBoundingRect", "title": "Hyper-Rectangle Bounding a Set of Level Set Segments", "topics": [ "segBoundingRect" ] }, { "page": "segInfo", "title": "Information About Level Set Line Segments", "topics": [ "segInfo" ] }, { "page": "slicedBdryFromRays", "title": "Ray-Based Exploration of the Boundary of a Level Set", "topics": [ "slicedBdryFromRays" ] }, { "page": "slicedBdrySearch", "title": "Ray-Based Exploration of the Boundary of a Level Set", "topics": [ "slicedBdrySearch" ] }, { "page": "sliceMat", "title": "Define Slices of Input Space", "topics": [ "sliceMat" ] }, { "page": "srchControl", "title": "Default Control Parameters for Boundary Search Functions", "topics": [ "srchControl" ] }, { "page": 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