Package: gmsp
Title: Ground Motion Signal Processing
Version: 0.4.6
Authors@R: 
    person("Alejandro", "Verri Kozlowski", , "averri@fi.uba.ar",
           role = c("aut", "cre", "cph"),
           comment = c(ORCID = "0000-0002-8535-1170"))
Description: Implements short-time Fourier transform (STFT) based
        processing of strong-motion time series: time-grid
        regularisation, STFT-window and anti-alias-resampling strategy
        selection, edge tapering, and frequency-domain integration and
        differentiation, mapping a single input (acceleration,
        velocity, or displacement) to a consistent triplet under a
        chosen analysis bandwidth. Also provides
        intrinsic-mode-function decomposition via empirical mode
        decomposition (EMD), ensemble EMD (EEMD), and variational mode
        decomposition (VMD) with optional band-rule filtering; elastic
        single-degree-of-freedom (SDOF) response spectra
        (pseudo-spectral acceleration, velocity, and displacement) by
        exact state-space integration; intensity measures including
        peak, root-mean-square (RMS), Arias intensity,
        significant-duration, cumulative absolute velocity, mean
        period, and the derived indices earthquake destructiveness
        potential (EPI) and power-of-input (PDI); and D50 and D100
        horizontal response spectra. Methods: Huang et al. (1998)
        <doi:10.1098/rspa.1998.0193>, Wu and Huang (2009)
        <doi:10.1142/S1793536909000047>, Dragomiretskiy and Zosso
        (2014) <doi:10.1109/TSP.2013.2288675>, Boore (2010)
        <doi:10.1785/0120090179>. An optional indexing layer parses
        provider files in formats including 'PEER' 'NGA-West2' 'AT2',
        'CESMD' 'V2'/'V2c', 'NWZ' 'V2A', Geological Survey of Canada
        'TR', 'IGP'/'UCR' 'AC' variants, and generic two-column ASCII
        text, normalises components, writes per-record CSV
        (comma-separated values) and JSON (JavaScript Object Notation)
        pairs, and assembles a master record table.
License: MIT + file LICENSE
Encoding: UTF-8
Language: en-US
URL: https://averriK.github.io/gmsp/
Depends: R (>= 4.1.0)
Imports: data.table, digest, EMD, expm, hht, jsonlite, openssl, pracma,
        purrr, seewave, signal, spectral, stats, stringr, utils,
        VMDecomp
Suggests: knitr, rmarkdown, testthat (>= 3.0.0)
VignetteBuilder: knitr
Config/testthat/edition: 3
Config/roxygen2/version: 8.0.0
NeedsCompilation: no
Packaged: 2026-06-18 14:12:54 UTC; root
Author: Alejandro Verri Kozlowski [aut, cre, cph] (ORCID:
        <https://orcid.org/0000-0002-8535-1170>)
Maintainer: Alejandro Verri Kozlowski <averri@fi.uba.ar>
Repository: https://cran.r-universe.dev
Date/Publication: 2026-06-18 13:44:30 UTC
RemoteUrl: https://github.com/cran/gmsp
RemoteRef: HEAD
RemoteSha: 4006d4e849a89096a4521f090d83ee1c7f7312d6