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  "Title": "Species Richness and Extrapolation",
  "Description": "Functions for calculating species richness for rarefaction\nand extrapolation, primarily non-parametric species richness\nsuch as jackknife, Chao1, and ACE. Also available are functions\nfor plotting species richness and extrapolation curves, and\ncomputing standard diversity and entropy indices.",
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  "URL": "https://github.com/EricArcher/sprex",
  "BugReports": "https://github.com/EricArcher/sprex/issues",
  "License": "GNU General Public License",
  "Encoding": "UTF-8",
  "RoxygenNote": "7.3.2",
  "Config/pak/sysreqs": "libabsl-dev cmake libgdal-dev gdal-bin libgeos-dev\nlibglpk-dev libicu-dev libxml2-dev libssl-dev libproj-dev\nlibsqlite3-dev libudunits2-dev",
  "Repository": "https://swfsc.r-universe.dev",
  "Date/Publication": "2025-03-25 19:25:09 UTC",
  "RemoteUrl": "https://github.com/swfsc/sprex",
  "RemoteRef": "HEAD",
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  "NeedsCompilation": "no",
  "Packaged": {
    "Date": "2026-06-06 09:04:46 UTC",
    "User": "root"
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  "Author": "Eric Archer [aut, cre]",
  "Maintainer": "Eric Archer <eric.archer@noaa.gov>",
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    "name": "Southwest Fisheries Science Center"
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  "_realowner": "swfsc",
  "_cranurl": true,
  "_releases": [
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    {
      "page": "sprex-package",
      "title": "Calculate species richness and extrapolation metrics",
      "topics": [
        "sprex-package",
        "sprex"
      ]
    },
    {
      "page": "f0",
      "title": "Number of Unobserved Species",
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        "Chao1",
        "Clench",
        "f0",
        "iChao1",
        "jack1",
        "jack2",
        "Swor1"
      ]
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    {
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