data.table: Extension of `data.frame`

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, a fast friendly file reader and parallel file writer. Offers a natural and flexible syntax, for faster development.

Author
Matt Dowle [aut, cre], Arun Srinivasan [aut], Jan Gorecki [ctb], Tom Short [ctb], Steve Lianoglou [ctb], Eduard Antonyan [ctb]
Date of publication
2016-12-03 11:05:23
Maintainer
Matt Dowle <mattjdowle@gmail.com>
License
GPL-3 | file LICENSE
Version
1.10.0
URLs

View on CRAN

Man pages

address
Address in RAM of a variable
all.equal.data.table
Equality Test Between Two Data Tables
as.data.table
Coerce to data.table
as.data.table.xts
Efficient xts to as.data.table conversion
assign
Assignment by reference
as.xts.data.table
Efficient data.table to xts conversion
between
Convenience functions for range subsets.
chmatch
Faster match of character vectors
copy
Copy an entire object
data.table
Enhanced data.frame
data.table-class
S4 Definition for data.table
datatable-optimize
Optimisations in data.table
dcast.data.table
Fast dcast for data.table
duplicated
Determine Duplicate Rows
first
First item of an object
foverlaps
Fast overlap joins
frank
Fast rank
fread
Fast and friendly file finagler
fsort
Fast parallel sort
fwrite
Fast CSV writer
IDateTime
Integer based date class
J
Creates a Join data table
last
Last item of an object
like
Convenience function for calling regexpr.
melt.data.table
Fast melt for data.table
merge
Merge two data.tables
na.omit.data.table
Remove rows with missing values on columns specified
openmp-utils
Set or get number of threads that data.table should use
patterns
Obtain matching indices corresponding to patterns
print.data.table
data.table Printing Options
rbindlist
Makes one data.table from a list of many
rleid
Generate run-length type group id
rowid
Generate unique row ids within each group
setattr
Set attributes of objects by reference
setcolorder
Fast column reordering of a data.table by reference
setDF
Coerce a data.table to data.frame by reference
setDT
Coerce lists and data.frames to data.table by reference
setkey
Create key on a data table
setNumericRounding
Change or turn off numeric rounding
setops
Set operations for data tables
setorder
Fast row reordering of a data.table by reference
shift
Fast lead/lag for vectors and lists
shouldPrint
For use by packages that mimic/divert auto printing e.g....
special-symbols
Special symbols
split
Split data.table into chunks in a list
subset.data.table
Subsetting data.tables
tables
Display all objects of class 'data.table'
test.data.table
Runs a set of tests.
timetaken
Pretty print of time taken
transform.data.table
Data table utilities
transpose
Efficient transpose of list
truelength
Over-allocation access
tstrsplit
strsplit and transpose the resulting list efficiently

Files in this package

data.table
data.table/inst
data.table/inst/tests
data.table/inst/tests/fread_line_error.csv
data.table/inst/tests/tests.Rraw
data.table/inst/tests/russellCRLF.csv
data.table/inst/tests/536_fread_fill_4.txt
data.table/inst/tests/2008head.csv
data.table/inst/tests/issue_1113_fread.txt
data.table/inst/tests/1680-fread-header-encoding.csv
data.table/inst/tests/fread_blank3.txt
data.table/inst/tests/issue_1116_fread_few_lines_2.txt
data.table/inst/tests/1206FUT.txt
data.table/inst/tests/fread_blank.txt
data.table/inst/tests/issue_563_fread.txt
data.table/inst/tests/issue_1116_fread_few_lines.txt
data.table/inst/tests/530_fread.txt
data.table/inst/tests/russellCRCRLF.csv
data.table/inst/tests/issue_773_fread.txt
data.table/inst/tests/issue_785_fread.txt
data.table/inst/tests/issue_1462_fread_quotes.txt
data.table/inst/tests/issue_1573_fill.txt
data.table/inst/tests/quoted_multiline.csv
data.table/inst/tests/doublequote_newline.csv
data.table/inst/tests/536_fread_fill_1.txt
data.table/inst/tests/ch11b.dat
data.table/inst/tests/melt-warning-1752.tsv
data.table/inst/tests/issue_1330_fread.txt
data.table/inst/tests/536_fread_fill_2.txt
data.table/inst/tests/fread_blank2.txt
data.table/inst/tests/issue_1087_utf8_bom.csv
data.table/inst/tests/issue_1095_fread.txt
data.table/inst/tests/536_fread_fill_3_extreme.txt
data.table/inst/tests/issue_1164_json.txt
data.table/inst/doc
data.table/inst/doc/datatable-secondary-indices-and-auto-indexing.R
data.table/inst/doc/datatable-reshape.Rmd
data.table/inst/doc/datatable-faq.html
data.table/inst/doc/datatable-faq.Rmd
data.table/inst/doc/datatable-secondary-indices-and-auto-indexing.html
data.table/inst/doc/datatable-reshape.R
data.table/inst/doc/datatable-reference-semantics.Rmd
data.table/inst/doc/datatable-intro.html
data.table/inst/doc/datatable-intro.Rmd
data.table/inst/doc/datatable-reference-semantics.R
data.table/inst/doc/datatable-faq.R
data.table/inst/doc/datatable-keys-fast-subset.Rmd
data.table/inst/doc/datatable-reshape.html
data.table/inst/doc/datatable-reference-semantics.html
data.table/inst/doc/datatable-keys-fast-subset.html
data.table/inst/doc/datatable-intro.R
data.table/inst/doc/datatable-secondary-indices-and-auto-indexing.Rmd
data.table/inst/doc/datatable-keys-fast-subset.R
data.table/tests
data.table/tests/autoprint.R
data.table/tests/autoprint.Rout.save
data.table/tests/knitr.R
data.table/tests/knitr.Rout.mock
data.table/tests/knitr.Rout.save
data.table/tests/knitr.Rmd
data.table/tests/testthat.R
data.table/tests/testthat
data.table/tests/testthat/test-data.frame-like.R
data.table/tests/testthat/test-S4.R
data.table/tests/main.R
data.table/src
data.table/src/Makevars
data.table/src/ijoin.c
data.table/src/fastmean.c
data.table/src/fmelt.c
data.table/src/fsort.c
data.table/src/fwriteLookups.h
data.table/src/dogroups.c
data.table/src/chmatch.c
data.table/src/forder.c
data.table/src/fwrite.c
data.table/src/data.table.h
data.table/src/shift.c
data.table/src/gsumm.c
data.table/src/wrappers.c
data.table/src/reorder.c
data.table/src/fread.c
data.table/src/subset.c
data.table/src/transpose.c
data.table/src/between.c
data.table/src/vecseq.c
data.table/src/inrange.c
data.table/src/bmerge.c
data.table/src/frank.c
data.table/src/init.c
data.table/src/uniqlist.c
data.table/src/assign.c
data.table/src/rbindlist.c
data.table/src/fcast.c
data.table/src/quickselect.c
data.table/src/openmp-utils.c
data.table/NAMESPACE
data.table/NEWS.md
data.table/R
data.table/R/shift.R
data.table/R/utils.R
data.table/R/test.data.table.R
data.table/R/data.table.R
data.table/R/duplicated.R
data.table/R/bmerge.R
data.table/R/setkey.R
data.table/R/AllS4.R
data.table/R/getdots.R
data.table/R/onLoad.R
data.table/R/as.data.table.R
data.table/R/fmelt.R
data.table/R/onAttach.R
data.table/R/IDateTime.R
data.table/R/cedta.R
data.table/R/frank.R
data.table/R/last.R
data.table/R/uniqlist.R
data.table/R/openmp-utils.R
data.table/R/like.R
data.table/R/foverlaps.R
data.table/R/setops.R
data.table/R/c.factor.R
data.table/R/fcast.R
data.table/R/xts.R
data.table/R/timetaken.R
data.table/R/between.R
data.table/R/merge.R
data.table/R/fread.R
data.table/R/transpose.R
data.table/R/fwrite.R
data.table/R/tables.R
data.table/vignettes
data.table/vignettes/Makefile
data.table/vignettes/datatable-reshape.Rmd
data.table/vignettes/datatable-faq.Rmd
data.table/vignettes/datatable-reference-semantics.Rmd
data.table/vignettes/css
data.table/vignettes/css/bootstrap.css
data.table/vignettes/datatable-intro.Rmd
data.table/vignettes/datatable-keys-fast-subset.Rmd
data.table/vignettes/melt_enhanced.csv
data.table/vignettes/flights14.csv
data.table/vignettes/datatable-secondary-indices-and-auto-indexing.Rmd
data.table/vignettes/melt_default.csv
data.table/README.md
data.table/MD5
data.table/build
data.table/build/vignette.rds
data.table/DESCRIPTION
data.table/man
data.table/man/IDateTime.Rd
data.table/man/chmatch.Rd
data.table/man/as.xts.data.table.Rd
data.table/man/setcolorder.Rd
data.table/man/duplicated.Rd
data.table/man/rleid.Rd
data.table/man/setNumericRounding.Rd
data.table/man/shift.Rd
data.table/man/setattr.Rd
data.table/man/J.Rd
data.table/man/datatable-optimize.Rd
data.table/man/last.Rd
data.table/man/tables.Rd
data.table/man/special-symbols.Rd
data.table/man/all.equal.data.table.Rd
data.table/man/as.data.table.xts.Rd
data.table/man/truelength.Rd
data.table/man/rowid.Rd
data.table/man/melt.data.table.Rd
data.table/man/rbindlist.Rd
data.table/man/first.Rd
data.table/man/setops.Rd
data.table/man/setDT.Rd
data.table/man/copy.Rd
data.table/man/transpose.Rd
data.table/man/assign.Rd
data.table/man/setorder.Rd
data.table/man/merge.Rd
data.table/man/transform.data.table.Rd
data.table/man/split.Rd
data.table/man/between.Rd
data.table/man/address.Rd
data.table/man/setkey.Rd
data.table/man/tstrsplit.Rd
data.table/man/like.Rd
data.table/man/shouldPrint.Rd
data.table/man/fread.Rd
data.table/man/setDF.Rd
data.table/man/foverlaps.Rd
data.table/man/data.table-class.Rd
data.table/man/fwrite.Rd
data.table/man/na.omit.data.table.Rd
data.table/man/print.data.table.Rd
data.table/man/openmp-utils.Rd
data.table/man/as.data.table.Rd
data.table/man/frank.Rd
data.table/man/subset.data.table.Rd
data.table/man/patterns.Rd
data.table/man/fsort.Rd
data.table/man/data.table.Rd
data.table/man/timetaken.Rd
data.table/man/test.data.table.Rd
data.table/man/dcast.data.table.Rd
data.table/LICENSE