data.table v1.7.1
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Extension of data.frame for fast indexing, fast ordered joins, fast assignment, fast grouping and list columns.
Enhanced data.frame. Fast indexing, fast ordered joins,
fast assignment, fast grouping and list columns in a short and
flexible syntax. i and j may be expressions of column names
directly, for faster development. Example: X[Y] is a fast join
for large data.
Functions in data.table
| Name | Description | |
| merge | Merge Two Data Tables | |
| data.table-class | S4 Definition for data.table | |
| data.table | Enhanced data.frame | |
| between | Convenience function for range subset logic. | |
| duplicated | Determine Duplicate Rows | |
| transform.data.table | Data table utilities | |
| IDateTime | Integer based date class | |
| setkey | Create key on a data table | |
| timetaken | Pretty print of time taken | |
| subset.data.table | Subsetting data.tables | |
| all.equal | Equality Test Between Two Data Tables | |
| like | Convenience function for calling regexpr. | |
| truelength | Over-allocation access | |
| J | Creates a Join data table | |
| last | Last item of an object | |
| test.data.table | Runs a set of tests. | |
| tables | Display all objects of class 'data.table' | |
| := | Assignment by reference | |
| No Results! | ||
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Details
| License | GPL (>= 2) |
| URL | http://datatable.r-forge.r-project.org/, http://rwiki.sciviews.org/doku.php?id=packages:cran:data.table, http://crantastic.org/packages/data.table |
| BugReports | https://r-forge.r-project.org/tracker/?group_id=240 |
| Packaged | 2011-10-21 01:23:22 UTC; mdowle |
| Repository | CRAN |
| Date/Publication | 2011-10-22 12:05:13 |
| depends | base (>= 2.12.0) , R (>= 2.12.0) |
| suggests | chron , ggplot2 , hexbin , plyr , testthat (>= 0.4) |
| imports | methods |
| Contributors | T Short, S Lianoglou, M Dowle |
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