# Creating a vector
x<-c("female", "male", "male", "female")
 
# Using as.factor() Function
# to convert vector into factor
as.factor(x)

[1] female male   male   female
Levels: female male

data <- c("11.1", "3.11", "32.2", "2.2")
 
as.factor(data)

[1] 11.1 3.11 32.2 2.2 
Levels: 11.1 2.2 3.11 32.2