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data.table (version 1.9.4)

Extension of data.frame

Description

Fast aggregation of large data (e.g. 100GB in RAM), fast ordered joins, fast add/modify/delete of columns by group using no copies at all, list columns and a fast file reader (fread). Offers a natural and flexible syntax, for faster development.

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Install

install.packages('data.table')

Monthly Downloads

1,037,494

Version

1.9.4

License

GPL (>= 2)

Issues

Pull Requests

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Repository

https://github.com/Rdatatable/data.table/wiki

Maintainer

M Dowle

Last Published

October 2nd, 2014

Functions in data.table (1.9.4)

Determine Duplicate Rows

Convenience function for range subset logic.

Merge Two Data Tables

Integer based date class

Creates a Join data table

Display all objects of class 'data.table'

Copy an entire object

setNumericRounding

Change or turn off numeric rounding

Pretty print of time taken

Address in RAM of a variable

Makes one data.table from a list of many

transform.data.table

Data table utilities

test.data.table

Runs a set of tests.

data.table-package

Enhanced data.frame

data.table-class

S4 Definition for data.table

Convert a data.table to data.frame by reference

Equality Test Between Two Data Tables

Fast reordering of a data.table by reference

Fast and friendly file finagler

Faster match of character vectors

Last item of an object

Fast overlap joins

Create key on a data table

Convert lists and data.frames to data.table by reference

melt.data.table

Fast melt for data.table

Assignment by reference

subset.data.table

Subsetting data.tables

dcast.data.table

Fast dcast for data.table

Over-allocation access

Set attributes to objects by reference

Convenience function for calling regexpr.