How do I change date in the 2nd column in R?

Question

I have a data frame called School_Behavior.
I have a column "sex" with responses as

1 for male,
2 for female.

How do I only change the 1's and 2's in this column?

I want to change the responses of "1" to instead be "Male" and "2" to be "Female" — Andrea H, Oct 29 '18 at 18:31
Please include a [reproducible example](https://stackoverflow.com/a/5963610/2359523) with your question to aid with answers. — Anonymous coward, Oct 29 '18 at 19:58

score 0 · Answer 1 · answered Oct 29 '18 at 18:32

We can use do that with indexing. Assuming that the 'sex' is character column, convert it to numeric, use that as index to pass the string vector for replacement

df1$Sex <- c("Male", "Female")[as.numeric(df1$Sex)]

df1 <- data.frame(Sex = c("1", "2", "1", "2", "2"), stringsAsFactors = FALSE)

How do I change date in the 2nd column in R?

1 Answers1