Estimate the Effective Reproductive Number with Trend Filtering R package rtestim version 1.0.2 Use trend filtering, a type of regularized nonparametric regression, to estimate the instantaneous reproduction number, also called Rt. This value roughly says how many new infections will result from each new infection today. Values larger than 1 indicate that an epidemic is growing while those less than 1 indicate decline. For more details about this methodology, see Liu, Cai, Gustafson, and McDonald (2024) <doi:10.1371/journal.pcbi.1012324>. Software Depends: R (>= 3.6.2) Imports: checkmate, cli, dspline, ggplot2, Matrix, methods, Rcpp, rlang, tibble, tvdenoising, vctrs LinkingTo: BH, dspline, Rcpp, RcppEigen, testthat, tvdenoising Suggests: dplyr, forcats, knitr, nnet, rmarkdown, testthat (>= 3.0.0), tidyr, xml2 Daniel J. McDonald <daniel@stat.ubc.ca> Comprehensive R Archive Network (CRAN) Daniel J. McDonald [aut, cre, cph], Jiaping Liu [aut], Zhenglun Cai [ctb] MIT + file LICENSE (https://CRAN.R-project.org/package=rtestim/LICENSE) 2026-03-11 application/tgz https://CRAN.R-project.org/package=rtestim doi:10.32614/CRAN.package.rtestim