{
  "_id": "6a103d0bacfb0bcc41c9c1fb",
  "Package": "expm",
  "Type": "Package",
  "Title": "Matrix Exponential, Log, 'etc'",
  "Version": "1.0-1",
  "Date": "2024-11-02",
  "Authors@R": "c(person(\"Martin\", \"Maechler\", role=c(\"aut\",\"cre\"),\nemail=\"maechler@stat.math.ethz.ch\", comment = c(ORCID = \"0000-0002-8685-9910\"))\n, person(\"Christophe\",\"Dutang\", role = \"aut\", comment = c(ORCID = \"0000-0001-6732-1501\"))\n, person(\"Vincent\",   \"Goulet\", role = \"aut\", comment = c(ORCID = \"0000-0002-9315-5719\"))\n, person(\"Douglas\",   \"Bates\",      role = \"ctb\", comment = \"cosmetic clean up, in svn r42\")\n, person(\"David\",     \"Firth\",      role = \"ctb\", comment = \"expm(method= \\\"PadeO\\\" and \\\"TaylorO\\\")\")\n, person(\"Marina\",    \"Shapira\",    role = \"ctb\", comment = \"expm(method= \\\"PadeO\\\" and \\\"TaylorO\\\")\")\n, person(\"Michael\",   \"Stadelmann\", role = \"ctb\", comment = \"\\\"Higham08*\\\" methods, see ?expm.Higham08...\")\n)",
  "Contact": "expm-developers@lists.R-forge.R-project.org",
  "Description": "Computation of the matrix exponential, logarithm, sqrt,\nand related quantities, using traditional and modern methods.",
  "BuildResaveData": "no",
  "License": "GPL (>= 2)",
  "URL": "https://R-Forge.R-project.org/projects/expm/",
  "BugReports": "https://R-forge.R-project.org/tracker/?atid=472&group_id=107",
  "Encoding": "UTF-8",
  "Repository": "https://r-forge.r-universe.dev",
  "Date/Publication": "2024-11-02 14:45:22 UTC",
  "RemoteUrl": "https://github.com/r-forge/expm",
  "RemoteRef": "HEAD",
  "RemoteSha": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
  "RemoteSubdir": "pkg",
  "NeedsCompilation": "yes",
  "Packaged": {
    "Date": "2026-05-11 09:52:28 UTC",
    "User": "root"
  },
  "Author": "Martin Maechler [aut, cre] (ORCID:\n<https://orcid.org/0000-0002-8685-9910>),\nChristophe Dutang [aut] (ORCID:\n<https://orcid.org/0000-0001-6732-1501>),\nVincent Goulet [aut] (ORCID: <https://orcid.org/0000-0002-9315-5719>),\nDouglas Bates [ctb] (cosmetic clean up, in svn r42),\nDavid Firth [ctb] (expm(method= \"PadeO\" and \"TaylorO\")),\nMarina Shapira [ctb] (expm(method= \"PadeO\" and \"TaylorO\")),\nMichael Stadelmann [ctb] (\"Higham08*\" methods, see ?expm.Higham08...)",
  "Maintainer": "Martin Maechler <maechler@stat.math.ethz.ch>",
  "MD5sum": "aa88d09682070497aaf3a9b521b27ec2",
  "_user": "r-forge",
  "_type": "src",
  "_file": "expm_1.0-1.tar.gz",
  "_fileid": "8cbaa74d88be4d42388123b2f63261fb1af25d747508674351764f57e44f2bae",
  "_filesize": 457556,
  "_sha256": "8cbaa74d88be4d42388123b2f63261fb1af25d747508674351764f57e44f2bae",
  "_created": "2026-05-11T09:52:28.000Z",
  "_published": "2026-05-22T11:24:59.806Z",
  "_distro": "noble",
  "_jobs": [
    {
      "job": 77370047659,
      "time": 113,
      "config": "linux-devel-arm64",
      "r": "4.7.0",
      "check": "ERROR",
      "artifact": "6915428036"
    },
    {
      "job": 77370047668,
      "time": 146,
      "config": "linux-devel-x86_64",
      "r": "4.7.0",
      "check": "ERROR",
      "artifact": "6915439495"
    },
    {
      "job": 77370047624,
      "time": 113,
      "config": "linux-release-arm64",
      "r": "4.6.0",
      "check": "ERROR",
      "artifact": "6915428466"
    },
    {
      "job": 77370048024,
      "time": 120,
      "config": "linux-release-x86_64",
      "r": "4.6.0",
      "check": "ERROR",
      "artifact": "6915431099"
    },
    {
      "job": 77370047950,
      "time": 91,
      "config": "macos-oldrel-arm64",
      "r": "4.5.3",
      "check": "ERROR",
      "artifact": "6915420287"
    },
    {
      "job": 77370047605,
      "time": 272,
      "config": "macos-oldrel-x86_64",
      "r": "4.5.3",
      "check": "ERROR",
      "artifact": "6915480007"
    },
    {
      "job": 77370047439,
      "time": 106,
      "config": "macos-release-arm64",
      "r": "4.6.0",
      "check": "ERROR",
      "artifact": "6915425195"
    },
    {
      "job": 77370047546,
      "time": 195,
      "config": "macos-release-x86_64",
      "r": "4.6.0",
      "check": "ERROR",
      "artifact": "6915455372"
    },
    {
      "job": 77370046998,
      "time": 182,
      "config": "source",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "6915388951"
    },
    {
      "job": 77370047160,
      "time": 92,
      "config": "wasm-release",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7159336935"
    },
    {
      "job": 77370047815,
      "time": 113,
      "config": "windows-devel",
      "r": "4.7.0",
      "check": "ERROR",
      "artifact": "6915427886"
    },
    {
      "job": 77370048028,
      "time": 103,
      "config": "windows-oldrel",
      "r": "4.5.3",
      "check": "ERROR",
      "artifact": "6915424346"
    },
    {
      "job": 77370047922,
      "time": 189,
      "config": "windows-release",
      "r": "4.6.0",
      "check": "ERROR",
      "artifact": "6915455094"
    }
  ],
  "_buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971",
  "_status": "success",
  "_host": "GitHub-Actions",
  "_upstream": "https://github.com/r-forge/expm",
  "_commit": {
    "id": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
    "author": "mmaechler (Martin Maechler) <maechler@r-project.org>",
    "committer": "mmaechler (Martin Maechler) <maechler@r-project.org>",
    "message": "fix rare is.null(osVersion)\n\ngit-svn-id: svn://svn.r-forge.r-project.org/svnroot/expm@115 edb9625f-4e0d-4859-8d74-9fd3b1da38cb\n",
    "time": 1730558722
  },
  "_maintainer": {
    "name": "Martin Maechler",
    "email": "maechler@stat.math.ethz.ch",
    "login": "mmaechler",
    "mastodon": "@MMaechler@fosstodon.org",
    "linkedin": "in/martinmaechlereth",
    "twitter": "@MMaechler",
    "uuid": 995722,
    "orcid": "0000-0002-8685-9910"
  },
  "_registered": true,
  "_dependencies": [
    {
      "package": "Matrix",
      "role": "Depends"
    },
    {
      "package": "methods",
      "role": "Imports"
    },
    {
      "package": "RColorBrewer",
      "role": "Suggests"
    },
    {
      "package": "sfsmisc",
      "role": "Suggests"
    },
    {
      "package": "Rmpfr",
      "role": "Suggests"
    }
  ],
  "_owner": "r-forge",
  "_selfowned": true,
  "_usedby": 454,
  "_updates": [],
  "_tags": [],
  "_stars": 0,
  "_contributors": [
    {
      "user": "mmaechler",
      "count": 101,
      "uuid": 995722
    },
    {
      "user": "dutangc",
      "count": 9,
      "uuid": 6387382
    },
    {
      "user": "vigou3",
      "count": 3,
      "uuid": 18180682
    },
    {
      "user": "dmbates",
      "count": 1,
      "uuid": 371258
    },
    {
      "user": "theussl",
      "count": 1,
      "uuid": 22165873
    }
  ],
  "_userbio": {
    "uuid": 75573726,
    "type": "organization",
    "name": " R-Forge",
    "description": "git-svn mirrors from R-Forge"
  },
  "_downloads": {
    "count": 86036,
    "source": "https://cranlogs.r-pkg.org/downloads/total/last-month/expm"
  },
  "_mentions": 5,
  "_devurl": "https://github.com/r-forge/expm",
  "_searchresults": 2080,
  "_topics": [
    "openblas"
  ],
  "_rbuild": "4.6.0",
  "_assets": [
    "extra/citation.cff",
    "extra/citation.html",
    "extra/citation.json",
    "extra/citation.txt",
    "extra/contents.json",
    "extra/expm.html",
    "manual.pdf"
  ],
  "_homeurl": "https://github.com/r-forge/expm",
  "_realowner": "r-forge",
  "_cranurl": true,
  "_releases": [
    {
      "version": "0.98-1",
      "date": "2010-07-08"
    },
    {
      "version": "0.98-2",
      "date": "2010-07-27"
    },
    {
      "version": "0.98-3",
      "date": "2010-08-14"
    },
    {
      "version": "0.98-4",
      "date": "2011-03-31"
    },
    {
      "version": "0.98-5",
      "date": "2011-08-20"
    },
    {
      "version": "0.99-0",
      "date": "2012-09-04"
    },
    {
      "version": "0.99-1",
      "date": "2013-12-10"
    },
    {
      "version": "0.99-1.1",
      "date": "2014-02-12"
    },
    {
      "version": "0.999-0",
      "date": "2015-10-07"
    },
    {
      "version": "0.999-1",
      "date": "2017-02-02"
    },
    {
      "version": "0.999-2",
      "date": "2017-03-29"
    },
    {
      "version": "0.999-3",
      "date": "2018-09-22"
    },
    {
      "version": "0.999-4",
      "date": "2019-03-21"
    },
    {
      "version": "0.999-5",
      "date": "2020-07-20"
    },
    {
      "version": "0.999-6",
      "date": "2021-01-13"
    },
    {
      "version": "0.999-7",
      "date": "2023-01-09"
    },
    {
      "version": "0.999-8",
      "date": "2023-11-29"
    },
    {
      "version": "0.999-9",
      "date": "2024-01-11"
    },
    {
      "version": "1.0-0",
      "date": "2024-08-19"
    }
  ],
  "_exports": [
    ".methComplex",
    ".methSparse",
    "%^%",
    "balance",
    "dgebal",
    "expAtv",
    "expm",
    "expm.Higham08",
    "expmCond",
    "expmFrechet",
    "logm",
    "sqrtm"
  ],
  "_datasets": [
    {
      "name": "matStig",
      "title": "Stig's \"infamous\" Example Matrix",
      "object": "matStig",
      "file": "matStig.R",
      "class": [
        "matrix",
        "array"
      ],
      "fields": {},
      "rows": 8,
      "table": true,
      "tojson": true
    }
  ],
  "_help": [
    {
      "page": "balance",
      "title": "Balance a Square Matrix via LAPACK's DGEBAL",
      "topics": [
        "balance",
        "dgebal"
      ]
    },
    {
      "page": "expAtv",
      "title": "Compute Matrix Exponential exp(A t) * v directly",
      "topics": [
        "expAtv",
        "expmv"
      ]
    },
    {
      "page": "expm",
      "title": "Matrix Exponential",
      "topics": [
        ".methComplex",
        ".methSparse",
        "expm",
        "mexp"
      ]
    },
    {
      "page": "expm.Higham08",
      "title": "Matrix Exponential [Higham 2008]",
      "topics": [
        "expm.Higham08"
      ]
    },
    {
      "page": "expmCond",
      "title": "Exponential Condition Number of a Matrix",
      "topics": [
        "expmCond"
      ]
    },
    {
      "page": "expmFrechet",
      "title": "Frechet Derivative of the Matrix Exponential",
      "topics": [
        "expmFrechet"
      ]
    },
    {
      "page": "logm",
      "title": "Matrix Logarithm",
      "topics": [
        "logm"
      ]
    },
    {
      "page": "matpow",
      "title": "Matrix Power",
      "topics": [
        "%^%",
        "matpow"
      ]
    },
    {
      "page": "matStig",
      "title": "Stig's \"infamous\" Example Matrix",
      "topics": [
        "matStig"
      ]
    },
    {
      "page": "sqrtm",
      "title": "Matrix Square Root",
      "topics": [
        "sqrtm"
      ]
    }
  ],
  "_rundeps": [
    "lattice",
    "Matrix"
  ],
  "_sysdeps": [
    {
      "shlib": "liblapack",
      "package": "libopenblas0-pthread",
      "source": "openblas",
      "version": "0.3.26+ds-1ubuntu0.1",
      "name": "openblas",
      "homepage": "https://www.openblas.net/",
      "description": "Optimized BLAS (linear algebra) library (shared lib, pthread)"
    },
    {
      "shlib": "libblas",
      "package": "libopenblas0-pthread",
      "source": "openblas",
      "version": "0.3.26+ds-1ubuntu0.1",
      "name": "openblas",
      "homepage": "https://www.openblas.net/",
      "description": "Optimized BLAS (linear algebra) library (shared lib, pthread)"
    }
  ],
  "_vignettes": [
    {
      "source": "expm.Rnw",
      "filename": "expm.pdf",
      "title": "Using expm in packages",
      "engine": "utils::Sweave",
      "headings": [],
      "created": "2013-07-04 15:15:32",
      "modified": "2013-07-04 15:15:32",
      "commits": 1
    }
  ],
  "_score": 11.687950649097113,
  "_indexed": true,
  "_nocasepkg": "expm",
  "_universes": [
    "r-forge",
    "mmaechler"
  ],
  "_binaries": [
    {
      "r": "4.7.0",
      "os": "linux",
      "version": "1.0-1",
      "date": "2026-05-11T09:54:17.000Z",
      "distro": "noble",
      "arch": "aarch64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "1728a26ab0f5e8a7dc3e8ad9b10686ce744c18e36c46705a1d1ea775a349e266",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.7.0",
      "os": "linux",
      "version": "1.0-1",
      "date": "2026-05-11T09:54:46.000Z",
      "distro": "noble",
      "arch": "x86_64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "755701e2aa0ce4ed20807f1a350da7f7cc2d3901e2ccb096e8578a155f65b9f3",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.6.0",
      "os": "linux",
      "version": "1.0-1",
      "date": "2026-05-11T09:54:18.000Z",
      "distro": "noble",
      "arch": "aarch64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "146a6f8e8d6e2023e57b097e1fa86ee8039f455d29e4b95f35cd4657be2ae0e2",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.6.0",
      "os": "linux",
      "version": "1.0-1",
      "date": "2026-05-11T09:54:21.000Z",
      "distro": "noble",
      "arch": "x86_64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "f023bad0944b8b254b788c697608ca85db77e919a6ddcbc9f18347d224f6efcd",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.5.3",
      "os": "mac",
      "version": "1.0-1",
      "date": "2026-05-11T09:54:01.000Z",
      "arch": "aarch64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "caf5b311bdc2b39780f7340386fe47b6d93a4bd92fbe41930e823398d9e1dfe1",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.5.3",
      "os": "mac",
      "version": "1.0-1",
      "date": "2026-05-11T09:56:21.000Z",
      "arch": "x86_64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "2e7944b081b3710d86f650bda14250421aabbe18e89f6935a3d083c425f29919",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.6.0",
      "os": "mac",
      "version": "1.0-1",
      "date": "2026-05-11T09:54:04.000Z",
      "arch": "aarch64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "19af78a7b8b7a23fe8c63af1f1649fa18204c489aad126b88a3d41442d54d38e",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.6.0",
      "os": "mac",
      "version": "1.0-1",
      "date": "2026-05-11T09:55:08.000Z",
      "arch": "x86_64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "11569716b4db7923859ef457975cd1c9676125bfadb1b9e144331de410d72419",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.7.0",
      "os": "win",
      "version": "1.0-1",
      "date": "2026-05-11T09:53:52.000Z",
      "arch": "x86_64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "6adeec370ff3b751c1e03c11507840efc085772235e8e6916a56c8dc4456c132",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.5.3",
      "os": "win",
      "version": "1.0-1",
      "date": "2026-05-11T09:53:49.000Z",
      "arch": "x86_64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "a164c0adf2fcbfe43cb0700480a7af14218bb50392769fe03403213d1e4d962d",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.6.0",
      "os": "win",
      "version": "1.0-1",
      "date": "2026-05-11T09:55:12.000Z",
      "arch": "x86_64",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "af372b27d0cf5e83874d2c965d5e5fbde2b3e336397aa5eac671b1306c0d1131",
      "status": "failure",
      "check": "ERROR",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    },
    {
      "r": "4.6.0",
      "os": "wasm",
      "version": "1.0-1",
      "date": "2026-05-22T11:24:40.000Z",
      "arch": "emscripten",
      "commit": "d1ba35f23f3faed2413f5ae32f51ff229109f9ee",
      "fileid": "d6c02a73c44b3043155aa2c2c83a62a007c6e57080f382d7fd4230360b3be03b",
      "status": "success",
      "buildurl": "https://github.com/r-universe/r-forge/actions/runs/25662897971"
    }
  ]
}