View source: R/utility_functions.R
unfactor | R Documentation |
Convert the factor columns of a data.frame to character or numeric.
unfactor(data)
data |
A factor variable or a data.frame containing factor variables. |
If the levels of a factor variable in data represent numeric values the variable will be converted to a numeric data type, otherwise it is converted to a character data type.
A vector or data.frame no longer containing any factor variables.
na2empty
## Generate example data.frame of factors with factor levels of numeric, ## character and mixed data types. N <- 20 ex1 <- data.frame( factor( sample( c(0,1,NA), size = N, prob = c(0.4,0.3,0.3), replace = TRUE ) ) ) names( ex1 ) <- "num" ex1$char <- factor( sample( c("Control","Experimental", NA ), size = N, prob = c(0.4,0.3,0.3), replace = TRUE ) ) ex1$mixed <- factor( sample( c(10,'A',NA), size = N, prob = c(0.4,0.3,0.3), replace = TRUE ) ) ## Initially the data type of all variables in ex1 is factor ex1 class( ex1$num ) #factor class( ex1$char ) #factor class( ex1$mixed ) #factor ## Now convert all factor variables to numeric or character ex2 <- unfactor( ex1 ) ex2 ## The data types are now numeric or character class( ex2$num ) # numeric class( ex2$char ) # character class( ex2$mixed ) # character ## The <NA> notation for missing factor values that have been converted to ## character can be changed to an empty string for easier reading by use of ## the function na2empty(). ex2$char <- na2empty( ex2$char ) ex2$mixed <- na2empty( ex2$mixed ) ex2
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