Giulio Barcaroli
2018-Oct-08 14:25 UTC
[R-pkgs] Announcement: SamplingStrata 1.3 on the CRAN
I am pleased to announce that a new release (1.3) of SamplingStrata is now available on CRAN. This version offers a numer of important new features: o The optimization of the stratification of the population frame is run in parallel if different domains are considered. If not specified, n-1 of total available cores are used OR if number of domains < (n-1) cores, then a number of cores equal to number of domains are used. o A new function 'KmeansSolution' produces an initial solution using the kmeans algorithm by clustering atomic strata considering the values of the means of target variables in them.By indicating this solution as a suggestion to the optimization step, this may greatly speed the convergence to the optimal solution. o A new function 'selectSampleSystematic' has been added. It allows to select a stratified sample with the systematic method. o It is now possible to handle "anticipated variance" by introducing a model linking a proxy variable whose values are available for all units in the sampling frame, with the target variable whose values are not available. In this implementation only linear model can be chosen. The package can be downloaded and installed from CRAN via: install.packages("SamplingStrata") or from github: devtools::install_github("barcaroli/SamplingStrata") Report any issue at: https://github.com/barcaroli/SamplingStrata/issues You can also find additional information at: https://barcaroli.github.io/SamplingStrata/index.html -- Giulio Barcaroli Methods, Quality and Metadata Division - Methodologies Directorate Italian National Institute of Statistics [[alternative HTML version deleted]]