Package: ungroup
Type: Package
Title: Penalized Composite Link Model for Efficient Estimation of
        Smooth Distributions from Coarsely Binned Data
Version: 1.4.5
Authors@R: c(
  person("Marius D.", "Pascariu", role = c("aut", "cre"), email = "rpascariu@outlook.com", comment = c(ORCID = "0000-0002-2568-6489")),
  person("Silvia", "Rizzi", role = "aut", email = "srizzi@health.sdu.dk"),
  person("Jonas", "Schoeley", role = "aut", comment = c(ORCID = "0000-0002-3340-8518")),
  person("Maciej J.", "Danko", role = "aut", email = "Danko@demogr.mpg.de", comment = c(ORCID = "0000-0002-7924-9022"))
  )
Description: Versatile method for ungrouping histograms (binned count
        data) assuming that counts are Poisson distributed and that the
        underlying sequence on a fine grid to be estimated is smooth.
        The method is based on the composite link model and estimation
        is achieved by maximizing a penalized likelihood. Smooth
        detailed sequences of counts and rates are so estimated from
        the binned counts. Ungrouping binned data can be desirable for
        many reasons: Bins can be too coarse to allow for accurate
        analysis; comparisons can be hindered when different grouping
        approaches are used in different histograms; and the last
        interval is often wide and open-ended and, thus, covers a lot
        of information in the tail area. Age-at-death distributions
        grouped in age classes and abridged life tables are examples of
        binned data. Because of modest assumptions, the approach is
        suitable for many demographic and epidemiological applications.
        For a detailed description of the method and applications see
        Rizzi et al. (2015) <doi:10.1093/aje/kwv020>.
License: MIT + file LICENSE
LazyData: TRUE
Depends: R (>= 3.4.0)
Imports: pbapply (>= 1.3), Rcpp (>= 0.12.0), Rdpack (>= 0.8), Matrix
LinkingTo: Rcpp, RcppEigen
Suggests: MortalityLaws (>= 1.5.0), knitr (>= 1.20), rmarkdown (>=
        1.10), testthat (>= 2.0.0)
RdMacros: Rdpack
URL: https://github.com/mpascariu/ungroup
BugReports: https://github.com/mpascariu/ungroup/issues
VignetteBuilder: knitr
Encoding: UTF-8
RoxygenNote: 7.3.0
Repository: https://mpascariu.r-universe.dev
Date/Publication: 2026-05-03 08:35:20 UTC
RemoteUrl: https://github.com/mpascariu/ungroup
RemoteRef: HEAD
RemoteSha: 2423c193b797d98e08ca61d3997bdeea02a9e63f
NeedsCompilation: yes
Packaged: 2026-07-02 07:39:55 UTC; root
Author: Marius D. Pascariu [aut, cre] (ORCID:
    <https://orcid.org/0000-0002-2568-6489>),
  Silvia Rizzi [aut],
  Jonas Schoeley [aut] (ORCID: <https://orcid.org/0000-0002-3340-8518>),
  Maciej J. Danko [aut] (ORCID: <https://orcid.org/0000-0002-7924-9022>)
Maintainer: Marius D. Pascariu <rpascariu@outlook.com>