| isCharacterDT {R2DT} | R Documentation |
Testing if a set of columns of a data.table object corresponds to the character/string data type
Description
Testing if a set of columns of a data.table object corresponds to the character/string data type
Usage
isCharacterDT(inputDT, colNamesToBeChecked = NULL, returnNames = FALSE)
Arguments
inputDT |
data.table object containing the data of interest. This is an obligatory argument, without default value. |
colNamesToBeChecked |
Character vector containing potential column names of the 'inputDT' argument. The default value is NULL. |
returnNames |
Logical vector of length 1 indicating whether or not the column name of the selected strings should be returned. The default value is FALSE. |
Value
A logical vector of length the size of the 'colNamesToBeChecked' argument, or in the absence of a value the number of columns of the 'inputDT' argument, that is TRUE if the corresponding column of the 'inputDT' argument is a string If the 'returnNames' argument equals TRUE, then only those column names from the aforementioned selection of column of the 'inputDT' argument are returned that is a string.
Examples
library(data.table)
inputDT <- as.data.table(data.frame(x = rep(c(TRUE, FALSE), 5), y = LETTERS[1:10]))
asFactorDT(inputDT, c('y'))
isCharacterDT(inputDT)
inputDT2 <- as.data.table(data.frame(y = LETTERS[1:10]))
isCharacterDT(inputDT2)
isCharacterDT(inputDT2, c('x', 'y'))
isCharacterDT(inputDT2, returnNames = TRUE)