{ "_id": "6a1e908e1d7bb097a0a6a1b2", "Package": "CharAnalysis", "Type": "Package", "Title": "Peak Detection and Fire History from Sediment-Charcoal Records", "Version": "2.0.3", "Date": "2026-04-29", "Authors@R": "person(\"Philip\", \"Higuera\",\nemail = \"philip.higuera@umontana.edu\",\nrole = c(\"aut\", \"cre\"),\ncomment = c(ORCID = \"0000-0003-1278-4095\"))", "Description": "A program for reconstructing local fire histories from\nhigh-resolution, continuously sampled lake-sediment charcoal\nrecords. 'CharAnalysis' decomposes a charcoal record into low-\nand high-frequency components and uses locally defined\nthresholds to separate fire signal from noise, following the\napproach of Higuera et al. (2009) , with\nunderlying assumptions and rationale described in Higuera et\nal. (2010) . The package is designed for\nmacroscopic charcoal records with contiguous sampling fine\nenough to resolve individual fire events, and is not\nappropriate for low-resolution or discontinuously sampled\nrecords. See the package URL for the User's Guide and\napplication examples.", "License": "GPL-3", "Encoding": "UTF-8", "URL": "https://github.com/phiguera/CharAnalysis,\nhttps://doi.org/10.5281/zenodo.19304064", "BugReports": "https://github.com/phiguera/CharAnalysis/issues", "VignetteBuilder": "knitr", "RoxygenNote": "7.3.3", "NeedsCompilation": "no", "Packaged": { "Date": "2026-06-02 08:09:07 UTC", "User": "root" }, "Author": "Philip Higuera [aut, cre] (ORCID:\n)", "Maintainer": "Philip Higuera ", "Repository": "https://phiguera.r-universe.dev", "Date/Publication": "2026-05-03 17:11:33 UTC", "RemoteUrl": "https://github.com/cran/CharAnalysis", "RemoteRef": "HEAD", "RemoteSha": "9cb04b22ad06e4e6024f10a5db806015616e5bef", "MD5sum": "9a9a44d747c184617d290af34dc94b90", "_user": "phiguera", "_type": "src", "_file": "CharAnalysis_2.0.3.tar.gz", "_fileid": "dd2377ea8c216e55c8be9786308191385fbf3e81a5f2ea0e6bc04fe014ec091b", "_filesize": 1662213, "_sha256": 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Sciences,\r\nUniversity of Montana,\r\nMissoula, MT 59812\r\n" }, "_downloads": { "count": 498, "source": "https://cranlogs.r-pkg.org/downloads/total/last-month/CharAnalysis" }, "_devurl": "https://github.com/phiguera/charanalysis", "_rbuild": "4.6.0", "_assets": [ "extra/CharAnalysis.html", "extra/citation.cff", "extra/citation.html", "extra/citation.json", "extra/citation.txt", "extra/contents.json", "extra/NEWS.html", "extra/NEWS.txt", "manual.pdf" ], "_realowner": "phiguera", "_cranurl": false, "_releases": [ { "version": "2.0.2", "date": "2026-04-28" }, { "version": "2.0.3", "date": "2026-05-03" } ], "_exports": [ "char_parameters", "char_plot_all", "char_plot_cumulative", "char_plot_fire_history", "char_plot_fri", "char_plot_peaks", "char_plot_raw", "char_plot_sni", "char_plot_thresh_diag", "char_plot_zones", "char_write_results", "CharAnalysis" ], "_help": [ { "page": "char_lowess", "title": "Locally-weighted linear regression matching MATLAB charLowess.m / smooth()", "topics": [ "char_lowess" ] }, { "page": "char_parameters", "title": "Read CharAnalysis parameter and data files", "topics": [ "char_parameters" ] }, { "page": "char_peak_id", "title": "Identify charcoal peaks and apply minimum-count screening", "topics": [ "char_peak_id" ] }, { "page": "char_plot", "title": "CharAnalysis output figures", "topics": [ "char_plot", "char_plot_all", "char_plot_cumulative", "char_plot_fire_history", "char_plot_fri", "char_plot_peaks", "char_plot_raw", "char_plot_sni", "char_plot_thresh_diag", "char_plot_zones" ] }, { "page": "char_pretreatment", "title": "Interpolate and pretreat a charcoal time series", "topics": [ "char_pretreatment" ] }, { "page": "char_smooth", "title": "Smooth charcoal record to estimate low-frequency C_background", "topics": [ "char_smooth" ] }, { "page": "char_thresh_global", "title": "Calculate a global threshold value for charcoal peak identification", "topics": [ "char_thresh_global" ] }, { "page": "char_thresh_local", "title": "Calculate a per-sample local threshold for charcoal peak identification", "topics": [ "char_thresh_local" ] }, { "page": "char_validate_params", "title": "Validate CharAnalysis input parameters", "topics": [ "char_validate_params" ] }, { "page": "char_write_results", "title": "Write the CharAnalysis results matrix to a CSV file", "topics": [ "char_write_results" ] }, { "page": "CharAnalysis", "title": "Run the full CharAnalysis pipeline", "topics": [ "CharAnalysis" ] }, { "page": "gaussian_mixture_em", "title": "Gaussian Mixture EM - direct R port of GaussianMixture.m (Bowman CLUSTER)", "topics": [ "gaussian_mixture_em" ] } ], "_rundeps": [ "lattice", "MASS", "zoo" ], "_vignettes": [ { "source": "CharAnalysis_intro.Rmd", "filename": "CharAnalysis_intro.html", "title": "CharAnalysis: Diagnostic and analytical tools for peak detection and fire-history interpretations using high-resolution sediment-charcoal records", "author": "Philip Higuera", "engine": "knitr::rmarkdown", "headings": [ "Overview", "Installation", "Worked example: Code Lake", "Input files", "Running the full pipeline", "Exploring the output", "The charcoal object", "The char_thresh object", "Post-processing metrics", "The char_results matrix", "Output figures", "Figure 1 — Smoothing options for C~background~", "Figure 2 — Local threshold determination diagnostics", "Figure 3 — C~interp~, C~background~, and C~peak~", "Figure 5 — Cumulative peaks through time", "Figure 6 — FRI distributions by zone", "Figure 7 — Continuous fire history", "Figure 8 — Between-zone CHAR comparisons", "Saving all figures to PDF", "Writing results to CSV", "Key parameters", "Comparison with MATLAB v2.0", "Citation", "References" ], "created": "2026-04-28 22:15:37", "modified": "2026-05-03 17:11:33", "commits": 2 } ], "_score": 2, "_indexed": true, "_nocasepkg": "charanalysis", "_universes": [ "phiguera" ], "_binaries": [ { "r": "4.7.0", "os": "linux", "version": "2.0.3", "date": "2026-06-02T08:11:16.000Z", "distro": "noble", 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