I have a data frame which has different clinical variables for patients who either had a heart failure or not?
I have a column as gender with values 0 and 1, 0 corresponding to females and 1 corresponding to males?
My question is
How can I get my data frame column from this
gender
1
1
0
1
0
0
to this...
gender
Female
Male
Male
Female
Male
Female
Female
Is there a way to convert the integers 0, 1 to text "Female" and "Male"
We can pass a replacement vector after converting to index by adding 1 to it. In R, the indexing starts from 1, and thus by adding 1 to 0, 1, the values are changed to 1 and 2 respectively which can be used as a position index for replacement
df1$gender <- c("Female", "Male")[df1$gender + 1]
ifelse() could work like this:
df <- data.frame(gender = c(1,0,1,0,3))
df$gender2 <- ifelse(df$gender == 1, "Male", "Female")
df
#> gender gender2
#> 1 1 Male
#> 2 0 Female
#> 3 1 Male
#> 4 0 Female
#> 5 3 Female
You can also stack multiple conditions:
df$gender3 <- ifelse(df$gender == 1, "Male",
ifelse(df$gender == 0, "Female", NA))
df
#> gender gender2 gender3
#> 1 1 Male Male
#> 2 0 Female Female
#> 3 1 Male Male
#> 4 0 Female Female
#> 5 3 Female <NA>