data.table (1.8.8)
Extension of data.frame for fast indexing, fast ordered joins, fast assignment, fast grouping and list columns..
http://datatable.r-forge.r-project.org/
http://cran.r-project.org/web/packages/data.table
Enhanced data.frame. Fast indexing, fast ordered joins, fast assignment, 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.
Maintainer:
Matthew Dowle
Author(s): M Dowle, T Short, S Lianoglou
License: GPL (>= 2)
Uses: chron, ggplot2, nlme, reshape, xts, hexbin, plyr, testthat, fastmatch, bit64
Reverse depends: FAOSTAT, postgwas, randomNames, RecordLinkage, SGP, survMisc, tabplot, treemap
Reverse suggests: Lahman, pcrsim, ProjectTemplate
Released 3 months ago.
26 previous versions
- data.table_1.8.6. Released 6 months ago.
- data.table_1.8.4. Released 7 months ago.
- data.table_1.8.2. Released 10 months ago.
- data.table_1.8.0. Released about 1 year ago.
- data.table_1.7.10. Released over 1 year ago.
- data.table_1.7.9. Released over 1 year ago.
- data.table_1.7.8. Released over 1 year ago.
- data.table_1.7.7. Released over 1 year ago.
- data.table_1.7.4. Released over 1 year ago.
- data.table_1.7.3. Released over 1 year ago.
- data.table_1.7.2. Released over 1 year ago.
- data.table_1.7.1. Released over 1 year ago.
- data.table_1.6.6. Released over 1 year ago.
- data.table_1.6.5. Released almost 2 years ago.
- data.table_1.6.4. Released almost 2 years ago.
- data.table_1.6.3. Released almost 2 years ago.
- data.table_1.6.2. Released almost 2 years ago.
- data.table_1.6.1. Released almost 2 years ago.
- data.table_1.6. Released about 2 years ago.
- data.table_1.5.3. Released over 2 years ago.
- data.table_1.5.2. Released over 2 years ago.
- data.table_1.5.1. Released over 2 years ago.
- data.table_1.5. Released over 2 years ago.
- data.table_1.4.1. Released about 3 years ago.
- data.table_1.2. Released almost 5 years ago.
- data.table_1.1. Released almost 5 years ago.
Ratings
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Reviews
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the number 1 package for me
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…
statquant gave data.table (1.8.8) a 5. Read the full review.
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if you're using data.frame, stop
use data.table instead and your life will become much faster and cleaner
eduard gave data.table (1.8.8) a 5. Read the full review.
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The new roll functions are a lifesaver!
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…
ronin78 did not rate data.table (1.8.8). Read the full review.
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Efficient
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.
MattP gave data.table (1.8.2) a 5. Read the full review.
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A review of data.table
It is much easier to subset, summarize, and investigate data.tables
thanks Samsung Galaxy S3 Casesjenifferhomes gave data.table (1.8.0) a 4. Read the full review.
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improves programming and computing speed
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…
dlebauer gave data.table (1.8.0) a 5. Read the full review.
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great library for data.mining
I think this library is essential for data mining algorithms in R, in order to reduce the processing time with huge data.frame!
micheledemeo gave data.table (1.7.10) a 5. Read the full review.
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Excellent
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…
yikelu gave data.table (1.7.10) a 5. Read the full review.
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Excellent
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…
yikelu gave data.table (1.7.10) a 5. Read the full review.
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The more I use it, the better it gets
I’m amazed how so m…
joseph.voelkel gave data.table (1.7.7) a 5. Read the full review.
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a very useful package!
As statistician, i think this package is very useful to work with big dataframe! You can work in a very intuitive way, without knowing SQL …. Th…
jj.dureau gave data.table (1.6.6) a 5. Read the full review.
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Data.table is fast compared to ddply and ave
I wrote the following response to a question on R-help. It compares the speed of data.table to ave and ddply:
It is part of this R-help thread:…
p.h.hiemstra did not rate data.table (1.6.5). Read the full review.
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data.table rocks!
data.table rocks!
peterhansl gave data.table (1.6) a 5. Read the full review.
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Efficient and simple
I started to use it on a regular basis recently and I managed to cut computing time dramatically. I’m now running much larger simulations in less t…
arnaud.amsellem gave data.table (1.5.3) a 5. Read the full review.
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very useful
I found this package right after I was working with data frames large enough that many summaries were taking 30-60 seconds each. The use of data.ta…
joseph.voelkel gave data.table (1.5) a 5. Read the full review.
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Amazing package!
This is an amazing package!
I seriously believe that data.table should become a standard data type in R that replace or compatible with data.fr…
branson.owen gave data.table (1.4.1) a 5. Read the full review.
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Fast
I am somewhat new to the R realm, but data.tables have completely replaced data.frames for me. They are extremely fast at creating subsets and appl…
khoda gave data.table (1.2) a 4. Read the full review.
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I don't know where I would be w/o data.table
Data.table has saved me a tremendous amount of time. I previously had code that ran using plyr that would take all night to compute, and once I rew…
phubaba gave data.table (1.2) a 5. Read the full review.
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Fast Splitting/Sorting Operations in Frames
No other package saved me as much time as data.table.
Whom does it help? Anyone, who has large data frames or lists which need splitting or…
jorgusch gave data.table (1.2) a 5. Read the full review.
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The fast way to do SQL like operations in R
data.table provides a data type similar to a data.frame with the addition of indexes on columns. This means that if you are either trying to quickl…
i2pi gave data.table (1.2) a 5. Read the full review.
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