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Install
install.packages('data.table')
Monthly Downloads
891,046
Version
1.12.2
License
MPL-2.0 | file LICENSE
Maintainer
Matt Dowle
Last Published
April 7th, 2019
Functions in data.table (1.12.2)
Search functions
:=
Assignment by reference
duplicated
Determine Duplicate Rows
first
First item of an object
merge
Merge two data.tables
na.omit.data.table
Remove rows with missing values on columns specified
setorder
Fast row reordering of a data.table by reference
shift
Fast lead/lag for vectors and lists
datatable.optimize
Optimisations in data.table
dcast.data.table
Fast dcast for data.table
print.data.table
data.table Printing Options
IDateTime
Integer based date class
J
Creates a Join data table
data.table-class
S4 Definition for data.table
rbindlist
Makes one data.table from a list of many
setkey
Create key on a data.table
address
Address in RAM of a variable
all.equal
Equality Test Between Two Data Tables
foverlaps
Fast overlap joins
frank
Fast rank
data.table-package
Enhanced data.frame
setops
Set operations for data tables
tables
Display 'data.table' metadata
fsort
Fast parallel sort
rleid
Generate run-length type group id
last
Last item of an object
groupingsets
Grouping Set aggregation for data tables
setDTthreads
Set or get number of threads that data.table should use
fwrite
Fast CSV writer
rowid
Generate unique row ids within each group
patterns
Obtain matching indices corresponding to patterns
split
Split data.table into chunks in a list
setattr
Set attributes of objects by reference
subset.data.table
Subsetting data.tables
setcolorder
Fast column reordering of a data.table by reference
test.data.table
Runs a set of tests.
timetaken
Pretty print of time taken
truelength
Over-allocation access
transpose
Efficient transpose of list
transform.data.table
Data table utilities
as.matrix
Convert a data.table to a matrix
as.xts.data.table
Efficient data.table to xts conversion
fread
Fast and friendly file finagler
set2key
Deprecated.
roll
Rolling functions
setDF
Coerce a data.table to data.frame by reference
as.data.table
Coerce to data.table
tstrsplit
strsplit and transpose the resulting list efficiently
update.dev.pkg
Perform update of development version of a package
as.data.table.xts
Efficient xts to as.data.table conversion
chmatch
Faster match of character vectors
copy
Copy an entire object
like
Convenience function for calling regexpr.
setDT
Coerce lists and data.frames to data.table by reference
melt.data.table
Fast melt for data.table
setNumericRounding
Change or turn off numeric rounding
shouldPrint
For use by packages that mimic/divert auto printing e.g. IRkernel and knitr
special-symbols
Special symbols
between
Convenience functions for range subsets.