{ "_id": "6a22a54fcd65a98ecbd599fb", "Package": "psdr", "Title": "Use Time Series to Generate and Compare Power Spectral Density", "Version": "1.0.3", "Authors@R": "person(given = \"Yong-Han Hank\",\nfamily = \"Cheng\",\nrole = c(\"aut\", \"cre\"),\nemail = \"yhhc@uw.edu\",\ncomment = c(ORCID = \"0000-0001-7686-0697\"))", "Description": "Functions that allow you to generate and compare power\nspectral density (PSD) plots given time series data. Fast\nFourier Transform (FFT) is used to take a time series data,\nanalyze the oscillations, and then output the frequencies of\nthese oscillations in the time series in the form of a PSD\nplot.Thus given a time series, the dominant frequencies in the\ntime series can be identified. Additional functions in this\npackage allow the dominant frequencies of multiple groups of\ntime series to be compared with each other. To see example\nusage with the main functions of this package, please visit\nthis site:\n. The\nmathematical operations used to generate the PSDs are described\nin these sites:\n.\n.", "License": "GPL (>= 3) | file LICENSE", "Encoding": "UTF-8", "RoxygenNote": "7.1.1", "VignetteBuilder": "knitr", "Config/testthat/edition": "3", "NeedsCompilation": "no", "Packaged": { "Date": "2026-06-05 10:27:28 UTC", "User": "root" }, "Author": "Yong-Han Hank Cheng [aut, cre] (ORCID:\n)", "Maintainer": "Yong-Han Hank Cheng ", "Repository": "https://yhankcheng.r-universe.dev", "Date/Publication": "2025-09-08 02:13:43 UTC", "RemoteUrl": "https://github.com/cran/psdr", "RemoteRef": "HEAD", "RemoteSha": "cc025c9152e9b8bcfa43cafd680d76f5ef797bfd", "MD5sum": "82c49dc1936b36c4ba4947f2ca2b0ac2", "_user": "yhankcheng", "_type": "src", "_file": "psdr_1.0.3.tar.gz", "_fileid": "10280d5d8a5156a6a1db957b860dde251dc2e0f141083491936d3685ff6f6189", "_filesize": 2124387, "_sha256": "10280d5d8a5156a6a1db957b860dde251dc2e0f141083491936d3685ff6f6189", "_created": "2026-06-05T10:27:28.000Z", "_published": 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observations", "topics": [ "FindHomogeneousWindows" ] }, { "page": "GenerateExampleData", "title": "Produce example data set for demonstrating package functions", "topics": [ "GenerateExampleData" ] }, { "page": "GetHomogeneousWindows", "title": "Get windows (dataframes) that have the same specified column values for all observations", "topics": [ "GetHomogeneousWindows" ] }, { "page": "GetSubsetOfWindows", "title": "Select only windows (dataframes) where a specified column matches a specified value", "topics": [ "GetSubsetOfWindows" ] }, { "page": "GetSubsetOfWindowsTwoLevels", "title": "Select only windows (dataframes) where a two specified columns must match specified values", "topics": [ "GetSubsetOfWindowsTwoLevels" ] }, { "page": "IdentifyMaxOnXY", "title": "Given a xy plot. 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