data.table v1.11.0

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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, friendly and fast character-separated-value read/write. Offers a natural and flexible syntax, for faster development.

Readme

Overview is on the project's homepage.

Functions in data.table

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

Name
css/bootstrap.css
Makefile
datatable-benchmarking.Rmd
datatable-faq.Rmd
datatable-importing.Rmd
datatable-intro.Rmd
datatable-keys-fast-subset.Rmd
datatable-reference-semantics.Rmd
datatable-reshape.Rmd
datatable-secondary-indices-and-auto-indexing.Rmd
flights14.csv
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Details

License MPL-2.0 | file LICENSE
URL http://r-datatable.com
BugReports https://github.com/Rdatatable/data.table/issues
VignetteBuilder knitr
ByteCompile TRUE
NeedsCompilation yes
Packaged 2018-05-01 09:56:37.471 UTC; mdowle
Repository CRAN
Date/Publication 2018-05-01 17:00:20 UTC

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