Hack: How to Convert all Character Variables to Factors
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Let’s say that we want to convert all Character Variables to Factors and we are dealing with a large data frame of many columns which means that is not practical to convert them one by one. Thus, our approach is to detect the “char” variables and to convert them to “Factors”.
Let’s provide a toy example:
df<-data.frame(Gender = c("F", "F", "M","M","F"),
Score = c(80, 70, 65, 85, 95),
Type = c("A","B","C","B","B"))
As we can see, the Gender and Type are char variables. Let’s convert them to factors.
df[sapply(df, is.character)] <- lapply(df[sapply(df, is.character)],
as.factor)
As we can see, we managed to convert them. Now, you can also rename and relevel the factors.
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