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data.table

Extension of data.frame for fast indexing, fast ordered joins, fast assignment, fast grouping and list columns.
M Dowle, T Short, S Lianoglou
GPL (>= 2)
Enhanced data.frame. Fast indexing, fast ordered joins, fast assignment by reference, fast grouping and list columns in a short and flexible syntax. i and j may be expressions of column names directly, for faster development. Example: X[Y] is a fast join for large data.
Versions
Package Version Released
data.table 1.8.8 3 years 12 weeks ago
data.table 1.8.6 3 years 28 weeks ago
data.table 1.8.4 3 years 29 weeks ago
data.table 1.8.2 3 years 46 weeks ago
data.table 1.8.10 2 years 38 weeks ago
data.table 1.8.0 4 years 9 weeks ago
data.table 1.7.9 4 years 17 weeks ago
data.table 1.7.8 4 years 18 weeks ago
data.table 1.7.7 4 years 24 weeks ago
data.table 1.7.4 4 years 26 weeks ago
Reviews
There are few packages that really improve R data.table is one of them. You are using data.frame ? this is over, stop, use data.table faster, more efficient, more functional. Thanks for letting...
5
use data.table instead and your life will become much faster and cleaner
5
I just wanted to say that I really appreciate the addition of the new roll functionality. Not only the ability to roll both backwards and forwards, but to limit the distance? Magic!
I am working with 6.5 million records with 35 columns and things are processing, merging and summarizing unbelievably fast on a 3 year old computer.
5
data.table is a perfect combination of useability and speed. The query syntax is very intuitive, the printing is smart, and the performance is much better than data.frame. data.table provides SQL-...
5
It is much easier to subset, summarize, and investigate data.tables thanks [Samsung Galaxy S3 Cases](http://www.cyberworldltd.co.uk/cases-for-samsung-model-galaxy-s3-i9300.htm)
4
data.table not only speeds up operations, it also speeds up programming. It is much easier to subset, summarize, and investigate data.tables at the command line because of the simplified syntax....
5
I think this library is essential for data mining algorithms in R, in order to reduce the processing time with huge data.frame!
5
data.table is a perfect combination of useability and speed. The query syntax is very intuitive, the printing is smart, and the performance is much better than data.frame. data.table provides SQL-...
5
This package does exactly what it promises: high speed with the ability to write elegant code and focus on the task at hand. I'm amazed how so much can get done in so few lines of code. I can...
5
4.48261
Your rating: None Overall: 4.5 (3278 votes)
4.11333
Your rating: None Documentation: 4.1 (2603 votes)