data.table v1.11.8

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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
J Creates a Join data table
datatable.optimize Optimisations in data.table
groupingsets Grouping Set aggregation for data tables
setattr Set attributes of objects by reference
tables Display 'data.table' metadata
dcast.data.table Fast dcast for data.table
fwrite Fast CSV writer
setcolorder Fast column reordering of a data.table by reference
test.data.table Runs a set of tests.
fread Fast and friendly file finagler
data.table-class S4 Definition for data.table
fsort Fast parallel sort
setorder Fast row reordering of a data.table by reference
melt.data.table Fast melt for data.table
data.table-package Enhanced data.frame
shift Fast lead/lag for vectors and lists
duplicated Determine Duplicate Rows
frank Fast rank
foverlaps Fast overlap joins
setDT Coerce lists and data.frames to data.table by reference
setNumericRounding Change or turn off numeric rounding
timetaken Pretty print of time taken
first First item of an object
transform.data.table Data table utilities
chmatch Faster match of character vectors
copy Copy an entire object
na.omit.data.table Remove rows with missing values on columns specified
last Last item of an object
like Convenience function for calling regexpr.
rbindlist Makes one data.table from a list of many
merge Merge two data.tables
setDTthreads 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
rowid Generate unique row ids within each group
shouldPrint For use by packages that mimic/divert auto printing e.g. IRkernel and knitr
setDF Coerce a data.table to data.frame by reference
split Split data.table into chunks in a list
rleid Generate run-length type group id
special-symbols Special symbols
tstrsplit strsplit and transpose the resulting list efficiently
setkey Create key on a data table
subset.data.table Subsetting data.tables
setops Set operations for data tables
update.dev.pkg Perform update of development version of a package
transpose Efficient transpose of list
truelength Over-allocation access
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
as.matrix Convert a data.table to a matrix
address Address in RAM of a variable
IDateTime Integer based date class
all.equal Equality Test Between Two Data Tables
:= Assignment by reference
between Convenience functions for range subsets.
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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 2018-09-29 08:30:08.301 UTC; mdowle
Repository CRAN
Date/Publication 2018-09-30 13:30:03 UTC

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