data.table v1.7.5
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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 | |
| J | Creates a Join data table | |
| last | Last item of an object | |
| setkey | Create key on a data table | |
| truelength | Over-allocation access | |
| data.table | Enhanced data.frame | |
| subset.data.table | Subsetting data.tables | |
| := | Assignment by reference | |
| like | Convenience function for calling regexpr. | |
| IDateTime | Integer based date class | |
| merge | Merge Two Data Tables | |
| tables | Display all objects of class 'data.table' | |
| duplicated | Determine Duplicate Rows | |
| transform.data.table | Data table utilities | |
| between | Convenience function for range subset logic. | |
| timetaken | Pretty print of time taken | |
| all.equal | Equality Test Between Two Data Tables | |
| data.table-class | S4 Definition for data.table | |
| test.data.table | Runs a set of tests. | |
| 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/?func=add&group_id=240&atid=975 |
| Packaged | 2011-12-04 11:34:50 UTC; mdowle |
| Repository | CRAN |
| Date/Publication | 2011-12-04 12:51:33 |
| 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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