| isFactorDT {R2DT} | R Documentation |
Testing if a set of columns of a data.table object corresponds to the factor data type
Description
Testing if a set of columns of a data.table object corresponds to the factor data type
Usage
isFactorDT(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 factors 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 factor. If the 'returnNames' argument equals TRUE, then only those column names from the aforementioned selection of column of the 'inputDT' argument are returned that are a factor.
Examples
library(data.table)
inputDT <- as.data.table(data.frame(x = seq(1, 20, 2), y = LETTERS[1:10]))
asFactorDT(inputDT, c('y'))
isFactorDT(inputDT)
isFactorDT(inputDT, c('x', 'y'))
isFactorDT(inputDT, returnNames = TRUE)
isFactorDT(inputDT, 'y')
isFactorDT(inputDT, c('x', 'y1'))