{ "_id": "6a1ed74cb401979e7340ed7d", "Package": "BTWAR", "Type": "Package", "Title": "Butterworth-Induced Autoregressive Model", "Version": "1.0.1", "Authors@R": "c(\nperson(\"Carlos\", \"Bras-Geraldes\",\nemail = \"cgeraldes@gmail.com\",\nrole = c(\"aut\", \"cre\", \"cph\")),\nperson(\"J. Leonel\", \"Rocha\",\nrole = c(\"aut\", \"cph\"))\n)", "Description": "Implements the Butterworth-Induced Autoregressive\n('BTWAR') model, where autoregressive coefficients are obtained\nfrom analog Butterworth filter prototypes mapped into the\ndiscrete-time domain using the Matched Z-Transform. The\nframework establishes a structured connection between\nfrequency-domain filter design and time-domain autoregressive\nmodeling. Model order selection is performed via nested\nrolling-origin cross-validation. Method described in\nBras-Geraldes, Rocha and Martins (2026)\n.", "License": "GPL-3", "Encoding": "UTF-8", "Language": "en-US", "NeedsCompilation": "no", "VignetteBuilder": "knitr", "URL": "https://doi.org/10.3390/math14030479,\nhttps://github.com/cgeraldes/BTWAR", "BugReports": "https://github.com/cgeraldes/BTWAR/issues", "Roxygen": "list(markdown = TRUE)", "RoxygenNote": "7.3.3", "Config/pak/sysreqs": "libssl-dev", "Repository": "https://cgeraldes.r-universe.dev", "Date/Publication": "2026-03-15 20:01:27 UTC", "RemoteUrl": "https://github.com/cgeraldes/btwar", "RemoteRef": "HEAD", "RemoteSha": "1e0a5729450812c54fe90e37de14ca969562bf5a", "Packaged": { "Date": "2026-05-20 10:04:02 UTC", "User": "root" }, "Author": "Carlos Bras-Geraldes [aut, cre, cph],\nJ. Leonel Rocha [aut, cph]", "Maintainer": "Carlos Bras-Geraldes ", "MD5sum": "85bafe701a6c634dc91ff3b65a8abf4f", "_user": "cgeraldes", "_type": "src", "_file": "BTWAR_1.0.1.tar.gz", "_fileid": "ec4c0912dfb50c2f41e0b4aeea14a9c6cb3a65824002ecf29fd39f1455614563", "_filesize": 717483, "_sha256": "ec4c0912dfb50c2f41e0b4aeea14a9c6cb3a65824002ecf29fd39f1455614563", "_created": "2026-05-20T10:04:02.000Z", "_published": "2026-06-02T13:14:52.645Z", "_distro": "noble", "_jobs": [ { "job": 79078974487, "time": 126, "config": "linux-devel-x86_64", "r": "4.7.0", "check": "OK", "artifact": "7107065037" }, { "job": 79078974742, "time": 130, "config": "linux-release-x86_64", "r": "4.6.0", "check": "OK", "artifact": "7107066059" }, { "job": 79078975099, "time": 152, "config": "macos-oldrel-arm64", "r": "4.5.3", "check": "OK", "artifact": "7107063727" }, { "job": 79078974470, "time": 200, "config": "macos-release-arm64", "r": "4.6.0", "check": "OK", "artifact": "7107074016" }, { "job": 79078974429, "time": 224, "config": "source", "r": "4.6.0", "check": "OK", "artifact": "7107021257" }, { "job": 79078973723, "time": 107, "config": "wasm-release", "r": "4.6.0", "check": "OK", "artifact": "7358685460" }, { "job": 79078975027, "time": 108, "config": "windows-devel", "r": "4.7.0", "check": "OK", "artifact": "7107059411" }, { "job": 79078975195, "time": 107, "config": "windows-oldrel", "r": "4.5.3", "check": "OK", "artifact": "7107059495" }, { "job": 79078974467, "time": 80, "config": "windows-release", "r": "4.6.0", "check": "OK", "artifact": "7107050361" } ], "_buildurl": "https://github.com/r-universe/cgeraldes/actions/runs/26155367067", "_status": "success", "_host": "GitHub-Actions", "_upstream": "https://github.com/cgeraldes/btwar", "_commit": { "id": "1e0a5729450812c54fe90e37de14ca969562bf5a", "author": "cgeraldes ", "committer": "cgeraldes ", "message": "Submission package\n", "time": 1773604887 }, "_maintainer": { "name": "Carlos Bras-Geraldes", "email": "cgeraldes@gmail.com", "login": "cgeraldes", "description": "", "uuid": 62844910 }, "_registered": true, "_dependencies": [ { "package": "R", "version": ">= 3.5.0", "role": "Depends" }, { "package": "ggplot2", "role": "Imports" }, { "package": "pracma", "role": "Imports" }, { "package": "tseries", "role": "Imports" }, { "package": "scales", "role": "Imports" }, { "package": "knitr", "role": "Suggests" }, { "package": "rmarkdown", "role": "Suggests" }, { "package": "spelling", "role": "Suggests" } ], "_owner": "cgeraldes", "_selfowned": true, "_usedby": 0, "_updates": [ { "week": "2026-09", "n": 2 }, { "week": "2026-10", "n": 13 }, { "week": "2026-11", "n": 6 } ], "_tags": [ { "name": "v1.0.1", "date": "2026-03-15" } ], "_stars": 0, "_contributors": [ { "user": "cgeraldes", "count": 26, "uuid": 62844910 } ], "_userbio": { "uuid": 62844910, "type": "user", "name": "Carlos Geraldes" }, "_downloads": { "count": 503, "source": "https://cranlogs.r-pkg.org/downloads/total/last-month/BTWAR" }, "_devurl": "https://github.com/cgeraldes/btwar", "_searchresults": 2, "_rbuild": "4.6.0", "_assets": [ "extra/BTWAR.html", "extra/citation.cff", "extra/citation.html", "extra/citation.json", "extra/citation.txt", "extra/contents.json", "extra/NEWS.html", "extra/NEWS.txt", "manual.pdf" ], "_homeurl": "https://github.com/cgeraldes/btwar", "_realowner": "cgeraldes", "_cranurl": true, "_releases": [ { "version": "1.0.1", "date": "2026-03-19" } ], "_exports": [ "apply_stationarity", "btwar_fit", "compute_spectrum", "mse", "plot_bode", "plot_freq_amplitude", "plot_zpoles", "poles_AR", "rmse", "simulate_ar_split", "yhat_ar", "yhat_arma" ], "_help": [ { "page": "apply_stationarity", "title": "Apply Stationarity Transformation to a Train/Test Split", "topics": [ "apply_stationarity" ] }, { "page": "btwar_fit", "title": "Fit a Butterworth-Induced Autoregressive Model", "topics": [ "btwar_fit" ] }, { "page": "coef.btwar", "title": "Extract AR Coefficients from a BTWAR Model", "topics": [ "coef.btwar" ] }, { "page": "compute_spectrum", "title": "Compute the One-Sided Power Spectrum", "topics": [ "compute_spectrum" ] }, { "page": "fitted.btwar", "title": "Fitted Values from a BTWAR Model", "topics": [ "fitted.btwar" ] }, { "page": "mse", "title": "Mean Squared Error", "topics": [ "mse" ] }, { "page": "plot_bode", "title": "Plot the Bode Magnitude Diagram of a BTWAR Model", "topics": [ "plot_bode" ] }, { "page": "plot_freq_amplitude", "title": "Plot the Frequency Amplitude Spectrum of a Time Series", "topics": [ "plot_freq_amplitude" ] }, { "page": "plot_zpoles", "title": "Plot Z-Plane Poles from a BTWAR Model", "topics": [ "plot_zpoles" ] }, { "page": "plot.btwar", "title": "Plot Predictions from a BTWAR Model", "topics": [ "plot.btwar" ] }, { "page": "poles_AR", "title": "Compute Z-Plane Poles of an AR Model", "topics": [ "poles_AR" ] }, { "page": "predict.btwar", "title": "Predict from a BTWAR Model", "topics": [ "predict.btwar" ] }, { "page": "print.btwar", "title": "Print a BTWAR Model", "topics": [ "print.btwar" ] }, { "page": "print.summary.btwar", "title": "Print a BTWAR Model Summary", "topics": [ "print.summary.btwar" ] }, { "page": "residuals.btwar", "title": "Residuals from a BTWAR Model", "topics": [ "residuals.btwar" ] }, { "page": "rmse", "title": "Root Mean Squared Error", "topics": [ "rmse" ] }, { "page": "simulate_ar_split", "title": "Simulate an AR(p) Series and Split into Train/Test Sets", "topics": [ "simulate_ar_split" ] }, { "page": "summary.btwar", "title": "Summarise a BTWAR Model", "topics": [ "summary.btwar" ] }, { "page": "yhat_ar", "title": "One-Step-Ahead AR Predictions", "topics": [ "yhat_ar" ] }, { "page": "yhat_arma", "title": "One-Step-Ahead ARMA Predictions", "topics": [ "yhat_arma" ] } ], "_rundeps": [ "cli", "cpp11", "curl", "farver", "ggplot2", "glue", "gtable", "isoband", "jsonlite", "labeling", "lattice", "lifecycle", "pracma", "quadprog", "quantmod", "R6", "RColorBrewer", "rlang", "S7", "scales", "tseries", "TTR", "vctrs", "viridisLite", "withr", "xts", "zoo" ], "_vignettes": [ { "source": "BTWAR.Rmd", "filename": "BTWAR.html", "title": "Introduction to the BTWAR Package", "author": "Carlos Brás-Geraldes, J. Leonel Rocha", "engine": "knitr::rmarkdown", "headings": [ "Introduction", "Methodology", "Butterworth Filter Prototype", "Matched Z-Transform", "Correspondence Between Filter Order and AR Order", "The Butterworth-Induced Autoregressive Model", "Practical Properties of BTW-AR", "Model Fitting Pipeline", "End-to-End Example", "Setup", "Simulating Data", "Exploratory Analysis", "Fitting the BTW-AR Model", "Time-Series Predictions", "Spectral Interpretation: Bode Magnitude Diagram", "Frequency Amplitude Spectrum", "Z-Plane Pole Structure", "Robustness Options", "Conclusion", "Session Information", "References" ], "created": "2026-03-01 13:56:31", "modified": "2026-03-15 04:08:59", "commits": 6 } ], "_score": 3.4771212547196626, "_indexed": true, "_nocasepkg": "btwar", "_universes": [ "cgeraldes" ], "_binaries": [ { "r": "4.7.0", "os": "linux", "version": "1.0.1", "date": "2026-05-20T10:06:06.000Z", "distro": "noble", "commit": "1e0a5729450812c54fe90e37de14ca969562bf5a", "fileid": "f03a4ebb0d1bfd3be31296a52aba7a0e61c770cdf173fe675f12b547c6eaf8b0", "status": "success", "check": "OK", "buildurl": "https://github.com/r-universe/cgeraldes/actions/runs/26155367067" }, { "r": "4.6.0", "os": "linux", "version": "1.0.1", "date": "2026-05-20T10:06:14.000Z", "distro": "noble", "commit": "1e0a5729450812c54fe90e37de14ca969562bf5a", "fileid": "1216e6ca6528cfc4dbd0fed2dbdee9c1c03648fe8c7b5df2d00246b07df4bdf9", "status": "success", "check": "OK", "buildurl": "https://github.com/r-universe/cgeraldes/actions/runs/26155367067" }, { "r": "4.5.3", "os": "mac", "version": "1.0.1", "date": "2026-05-20T10:06:09.000Z", "commit": "1e0a5729450812c54fe90e37de14ca969562bf5a", "fileid": "eb7d1789932b6ff5f037362c6b62e90a72180d999202a3cf2ae4772620ac316f", "status": "success", "check": "OK", "buildurl": "https://github.com/r-universe/cgeraldes/actions/runs/26155367067" }, { "r": "4.6.0", "os": "mac", "version": "1.0.1", "date": "2026-05-20T10:06:30.000Z", "commit": "1e0a5729450812c54fe90e37de14ca969562bf5a", "fileid": "7a434d5f2599ce347335085ae002c3f3ec92b02b8ca0cfbef8687f82a2b21c38", "status": "success", "check": "OK", "buildurl": "https://github.com/r-universe/cgeraldes/actions/runs/26155367067" }, { "r": "4.7.0", "os": "win", "version": "1.0.1", "date": "2026-05-20T10:05:39.000Z", "commit": "1e0a5729450812c54fe90e37de14ca969562bf5a", "fileid": "9426038c6dc6625d9c8e2aefe56ddf307c3da6ac7c624efddfdaf95bc8bc5cd5", "status": "success", "check": "OK", "buildurl": "https://github.com/r-universe/cgeraldes/actions/runs/26155367067" }, { "r": "4.5.3", "os": "win", "version": "1.0.1", "date": "2026-05-20T10:05:42.000Z", "commit": "1e0a5729450812c54fe90e37de14ca969562bf5a", "fileid": "87ef4a59750b5b0bfbaf9b58a8557081bcd4c2b49c07bb7a98903bdc111ca1d2", "status": "success", "check": "OK", "buildurl": "https://github.com/r-universe/cgeraldes/actions/runs/26155367067" }, { "r": "4.6.0", "os": "win", "version": "1.0.1", "date": "2026-05-20T10:05:18.000Z", "commit": "1e0a5729450812c54fe90e37de14ca969562bf5a", "fileid": "3f681f3171a813ec45844518a097115eda38abd523ad36211c19971c155519a9", "status": "success", "check": "OK", "buildurl": "https://github.com/r-universe/cgeraldes/actions/runs/26155367067" }, { "r": "4.6.0", "os": "wasm", "version": "1.0.1", "date": "2026-06-02T13:14:26.000Z", "commit": "1e0a5729450812c54fe90e37de14ca969562bf5a", "fileid": "66689ef9ac5c9783769eb27da805a32d4deec732d6e6e992a6a5e30c464d4c63", "status": "success", "buildurl": "https://github.com/r-universe/cgeraldes/actions/runs/26155367067" } ] }