What is "data.table"

The package of R data.table provides an improved version of data frame., including rapid aggregation of large data sets, as well as faster operations of adding / modifying / deleting columns by reference, without repeatedly copying the database.

Because of this, it is known to be the fastest packet for data handling in R (see comparisons). In some cases it is faster even than other programming languages or data handling environments such as Julia, python or Spark.

Documentation

To package entry sticker instruct on basic concepts, syntax and use cases.

The package documentation can be found at wiki from your repository on github.