This package is considered a duplicate. The official version of this package is found at:https://rdatatable.r-universe.dev/data.table
Using .SD for Data Analysis
Authored by:Tyson Barrett indata.table 1.18.99.
Source:datatable-sd-usage.Rmd, Vignette:datatable-sd-usage.html. Last updated:2025-12-26.
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