python - Converting Yes and No to 0 and 1 in R

Question

How do I convert a categorical value (Yes/No) to numeric value (0/1) in a data set of 20 variables and 3144 observations in R?

Answer 1

In R we can either do

 df1[] <- +(df1=="Yes")

Or

df1[] <- lapply(df1, function(x) as.integer(x=="Yes"))

NOTE: If "Yes" should be 0 and "No" is 1, replace df1=="No" and x=="No" in the post.