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Install
install.packages('data.table')
Monthly Downloads
743,535
Version
1.12.8
License
MPL-2.0 | file LICENSE
Issues
868
Pull Requests
150
Stars
2,698
Forks
903
Repository
https://github.com/Rdatatable/data.table
Homepage
http://r-datatable.com
Maintainer
Matt Dowle
Last Published
December 9th, 2019
Functions in data.table (1.12.8)
Search functions
J
Creates a join
data.table
foverlaps
Fast overlap joins
fifelse
Fast ifelse
duplicated
Determine Duplicate Rows
dcast.data.table
Fast dcast for data.table
chmatch
Faster match of character vectors
fcoalesce
Coalescing missing values
data.table-class
S4 Definition for data.table
copy
Copy an entire object
data.table-package
Enhanced data.frame
datatable.optimize
Optimisations in data.table
fwrite
Fast CSV writer
groupingsets
Grouping Set aggregation for data tables
roll
Rolling functions
fsort
Fast parallel sort
like
Convenience function for calling grep.
melt.data.table
Fast melt for data.table
patterns
Obtain matching indices corresponding to patterns
print.data.table
data.table Printing Options
rowid
Generate unique row ids within each group
.Last.updated
Number of rows affected by last update
last
First/last item of an object
set2key
Deprecated.
rbindlist
Makes one data.table from a list of many
rleid
Generate run-length type group id
fread
Fast and friendly file finagler
frank
Fast rank
merge
Merge two data.tables
setattr
Set attributes of objects by reference
setNumericRounding
Change or turn off numeric rounding
setcolorder
Fast column reordering of a data.table by reference
setkey
Create key on a data.table
setDF
Coerce a data.table to data.frame by reference
na.omit.data.table
Remove rows with missing values on columns specified
setops
Set operations for data tables
special-symbols
Special symbols
transpose
Efficient transpose of list
setDT
Coerce lists and data.frames to data.table by reference
truelength
Over-allocation access
nafill
Fill missing values
subset.data.table
Subsetting data.tables
setorder
Fast row reordering of a data.table by reference
test
Test assertions for equality, exceptions and console output
tables
Display 'data.table' metadata
test.data.table
Runs a set of tests.
shift
Fast lead/lag for vectors and lists
shouldPrint
For use by packages that mimic/divert auto printing e.g. IRkernel and knitr
transform.data.table
Data table utilities
timetaken
Pretty print of time taken
setDTthreads
Set or get number of threads that data.table should use
split
Split data.table into chunks in a list
tstrsplit
strsplit and transpose the resulting list efficiently
update.dev.pkg
Perform update of development version of a package
address
Address in RAM of a variable
as.data.table.xts
Efficient xts to as.data.table conversion
as.matrix
Convert a data.table to a matrix
as.data.table
Coerce to data.table
as.xts.data.table
Efficient data.table to xts conversion
all.equal
Equality Test Between Two Data Tables
IDateTime
Integer based date class
:=
Assignment by reference
between
Convenience functions for range subsets.