| bit | Classes and Methods for Fast Memory-Efficient Boolean Selections |
| bit64 | A S3 Class for Vectors of 64bit Integers |
| commonmark | High Performance CommonMark and Github Markdown Rendering in R |
| data.table | Extension of `data.frame` |
| markdown | Render Markdown with 'commonmark' |
| R.methodsS3 | S3 Methods Simplified |
| R.oo | R Object-Oriented Programming with or without References |
| R.utils | Various Programming Utilities |
| xfun | Supporting Functions for Packages Maintained by 'Yihui Xie' |
| xts | eXtensible Time Series |
| zoo | S3 Infrastructure for Regular and Irregular Time Series (Z's
Ordered Observations) |
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