![[R logo]](../../../doc/html/Rlogo.svg)
![[Up]](../../../doc/html/left.jpg)
![[Top]](../../../doc/html/up.jpg)
| asCharacterDT | Forcing the character/string data type on a selected set of columns of a data.table object |
| asFactorDT | Forcing the character/string data type on a selected set of columns of a data.table object |
| asIntegerDT | Forcing the integer data type on a selected set of columns of a data.table object |
| asLogicalDT | Forcing the logical/boolean data type on a selected set of columns of a data.table object |
| asNumericDT | Forcing the numeric data type on a selected set of columns of a data.table object |
| checkDT | Checking if an object is a data.table object and (optional) testing if some column names are valid for it |
| detectWeirdLevelNamesDT | Detecting which levels of which factor of a data.table object contain non-alpha numeric characters (including whitespace) characters |
| extractLevelDT | Extracting the levels of all or a selected set of the factor columns of a data.table object |
| extractRefLevelDT | Extracting the reference level of all or a selected set of the factor columns of a data.table object |
| isCharacterDT | Testing if a set of columns of a data.table object corresponds to the character/string data type |
| isFactorDT | Testing if a set of columns of a data.table object corresponds to the factor data type |
| isIntegerDT | Testing if a set of columns of a data.table object corresponds to the integer data type |
| isLogicalDT | Testing if a set of columns of a data.table object corresponds to the logical/boolean data type |
| isNumericDT | Testing if a set of columns of a data.table object corresponds to the numeric data type |
| lowFreqLevel2MissingDT | Transform levels of all the factor columns of a data.table object to missing if too little observations pertain to a given level of it. |
| rbindDT | Glueing, not merging, two data.table objects together, by matching column names |
| removeEmptyLevelsDT | Remove empty levels from all the factor columns of a data.table object |
| setRefLevelDT | Setting the reference level of all or a selected set of the factor columns of a data.table object |
| sortByRowIndexDT | Order the rows of a data.table object by index |