Package: lgspline
Type: Package
Title: Lagrangian Multiplier Smoothing Splines for Smooth Function
        Estimation
Version: 1.2.1
Authors@R: 
    person("Matthew", "Davis", email = "matthewlouisdavis@gmail.com", 
           role = c("aut", "cre"),
           comment = c(ORCID = "0000-0001-9714-1018"))
Description: Implements Lagrangian multiplier smoothing splines for
        flexible nonparametric regression and function estimation.
        Provides tools for fitting, prediction, and inference using a
        constrained optimization approach to enforce smoothness.
        Supports generalized linear models, Weibull accelerated failure
        time (AFT) models, Cox proportional hazards models, quadratic
        programming constraints, and customizable working-correlation
        structures, with options for parallel fitting. The core spline
        construction builds on Ezhov et al. (2018)
        <doi:10.1515/jag-2017-0029>. Quadratic-programming and SQP
        details follow Goldfarb & Idnani (1983)
        <doi:10.1007/BF02591962> and Nocedal & Wright (2006)
        <doi:10.1007/978-0-387-40065-5>. For smoothing spline and
        penalized spline background, see Wahba (1990)
        <doi:10.1137/1.9781611970128> and Wood (2017)
        <doi:10.1201/9781315370279>. For variance-component and
        correlation-parameter estimation, see Searle et al. (2006)
        <ISBN:978-0470009598>. The default multivariate partitioning
        step uses k-means clustering as in MacQueen (1967).
License: MIT + file LICENSE
Language: en-US
Depends: R (>= 3.5.0)
Imports: Rcpp (>= 1.0.7), FNN, RColorBrewer, plotly, quadprog, methods,
        stats
LinkingTo: Rcpp, RcppArmadillo
Suggests: testthat (>= 3.0.0), spelling, knitr, rmarkdown, parallel,
        survival, MASS, graphics
URL: https://github.com/matthewlouisdavisBioStat/lgspline
BugReports: https://github.com/matthewlouisdavisBioStat/lgspline/issues
Encoding: UTF-8
RoxygenNote: 7.3.2
Config/testthat/edition: 3
NeedsCompilation: yes
Packaged: 2026-11-02 11:14:22 UTC; root
Author: Matthew Davis [aut, cre] (ORCID:
        <https://orcid.org/0000-0001-9714-1018>)
Maintainer: Matthew Davis <matthewlouisdavis@gmail.com>
Repository: https://cran.r-universe.dev
Date/Publication: 2026-08-04 20:30:02 UTC
RemoteUrl: https://github.com/cran/lgspline
RemoteRef: HEAD
RemoteSha: b0b1c8074b8fa1636472bbcf8c52192dc2068586