Sieve Methods for Non-Stationary Time Series R package Sie2nts version 0.1.0 We provide functions for estimation and inference of locally-stationary time series using the sieve methods and bootstrapping procedure. In addition, it also contains functions to generate Daubechies and Coiflet wavelet by Cascade algorithm and to process data visualization. Software Imports: ggplot2, Matrix, plotly, stringr, RCurl, splines, methods, utils, stats Suggests: knitr, rmarkdown Xiucai Ding <xiucaiding89@gmail.com> Comprehensive R Archive Network (CRAN) Xiucai Ding [aut, cre, cph], Chen Qian [aut, cph] MIT + file LICENSE (https://CRAN.R-project.org/package=Sie2nts/LICENSE) 2023-01-18 application/tgz https://CRAN.R-project.org/package=Sie2nts doi:10.32614/CRAN.package.Sie2nts