data.table v1.12.2
0
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 | |
| := | 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. | |
| No Results! | ||
Vignettes of data.table
Last month downloads
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 | 2019-03-28 19:54:17.679 UTC; mdowle |
| Repository | CRAN |
| Date/Publication | 2019-04-07 10:05:02 UTC |
Include our badge in your README
[](http://www.rdocumentation.org/packages/data.table)