data.table v1.12.8
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Monthly downloads
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.
Functions in data.table
Name | Description | |
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. | |
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Vignettes of data.table
Last month downloads
Details
SystemRequirements | zlib |
License | MPL-2.0 | file LICENSE |
URL | http://r-datatable.com, https://Rdatatable.gitlab.io/data.table, https://github.com/Rdatatable/data.table |
BugReports | https://github.com/Rdatatable/data.table/issues |
VignetteBuilder | knitr |
ByteCompile | TRUE |
NeedsCompilation | yes |
Packaged | 2019-12-08 22:28:25.859 UTC; mdowle |
Repository | CRAN |
Date/Publication | 2019-12-09 10:30:10 UTC |
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