Extension of data.frame

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Documentation for package ‘data.table’ version 1.9.2

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data.table-package Enhanced data.frame
%between% Convenience function for range subset logic.
%chin% Faster match of character vectors
%like% Convenience function for calling regexpr.
:= Assignment by reference
address Address in RAM of a variable
all.equal Equality Test Between Two Data Tables
all.equal.data.table Equality Test Between Two Data Tables
alloc.col Over-allocation access
as.character.ITime Integer based date class
as.chron.IDate Integer based date class
as.chron.ITime Integer based date class
as.data.table Enhanced data.frame
as.Date.IDate Integer based date class
as.IDate Integer based date class
as.IDate.Date Integer based date class
as.IDate.default Integer based date class
as.ITime Integer based date class
as.ITime.character Integer based date class
as.ITime.default Integer based date class
as.ITime.POSIXlt Integer based date class
as.ITime.times Integer based date class
as.list.IDate Integer based date class
as.POSIXct.IDate Integer based date class
as.POSIXct.ITime Integer based date class
as.POSIXlt.ITime Integer based date class
between Convenience function for range subset logic.
c.IDate Integer based date class
chgroup Faster match of character vectors
chmatch Faster match of character vectors
chorder Faster match of character vectors
CJ Creates a Join data table
class:data.table S4 Definition for data.table
copy Create key on a data table
cut.IDate Integer based date class
data.table Enhanced data.frame
data.table-class S4 Definition for data.table
dcast Fast dcast for data.table
dcast.data.table Fast dcast for data.table
duplicated Determine Duplicate Rows
duplicated.data.table Determine Duplicate Rows
format.ITime Integer based date class
fread Fast and friendly file finagler
haskey Create key on a data table
hour Integer based date class
IDate Integer based date class
IDate-class Integer based date class
IDateTime Integer based date class
IDateTime.default Integer based date class
is.data.table Enhanced data.frame
is.na.data.table Enhanced data.frame
ITime Integer based date class
ITime-class Integer based date class
J Creates a Join data table
key Create key on a data table
key<- Create key on a data table
last Last item of an object
like Convenience function for calling regexpr.
mday Integer based date class
mean.IDate Integer based date class
melt Fast melt for data.table
melt.data.table Fast melt for data.table
merge Merge Two Data Tables
merge.data.table Merge Two Data Tables
month Integer based date class
na.omit.data.table Enhanced data.frame
Ops.data.table Enhanced data.frame
print.ITime Integer based date class
quarter Integer based date class
rbindlist Makes one data.table from a list of many
rep.IDate Integer based date class
rep.ITime Integer based date class
round.IDate Integer based date class
seq.IDate Integer based date class
set Assignment by reference
setattr Create key on a data table
setcolorder Create key on a data table
setDT Create key on a data table
setkey Create key on a data table
setkeyv Create key on a data table
setnames Create key on a data table
SJ Creates a Join data table
split.IDate Integer based date class
subset Subsetting data.tables
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 utilities
transform.data.table Data table utilities
truelength Over-allocation access
unique Determine Duplicate Rows
unique.data.table Determine Duplicate Rows
wday Integer based date class
week Integer based date class
within Data table utilities
within.data.table Data table utilities
yday Integer based date class
year Integer based date class
[.data.table Enhanced data.frame