Package: Blend Type: Package Title: Robust Bayesian Longitudinal Regularized Semiparametric Mixed Models Version: 0.1.3 Date: 2026-09-28 Authors@R: c( person("Kun", "Fan", role = c("aut", "cre") , email = "fzt0428@gmail.com"), person("Cen", "Wu", role = "aut")) Description: Our recently developed fully robust Bayesian semiparametric mixed-effect model for high-dimensional longitudinal studies with heterogeneous observations can be implemented through this package. This model can distinguish between time-varying interactions and constant-effect-only cases to avoid model misspecifications. Facilitated by spike-and-slab priors, this model leads to superior performance in estimation, identification and statistical inference. In particular, robust Bayesian inferences in terms of valid Bayesian credible intervals on both parametric and nonparametric effects can be validated on finite samples. The Markov chain Monte Carlo algorithms of the proposed and alternative models are efficiently implemented in 'C++'. Depends: R (>= 4.2.0) License: GPL-2 Encoding: UTF-8 URL: https://github.com/kunfa/Blend LinkingTo: Rcpp, RcppArmadillo Imports: Rcpp, splines, stats, ggplot2 Config/roxygen2/version: 8.1.0 Repository: https://kunfa.r-universe.dev Date/Publication: 2026-09-28 16:30:11 UTC RemoteUrl: https://github.com/kunfa/blend RemoteRef: HEAD RemoteSha: dce932d2c5925820149317bd129cf114db552c09 NeedsCompilation: yes Packaged: 2026-09-28 16:51:13 UTC; root Author: Kun Fan [aut, cre], Cen Wu [aut] Maintainer: Kun Fan