Avoid: Warning message: NAs introduced by coercion

Asked Jan 31 '17 at 12:33

Active Jan 31 '17 at 12:33

Viewed 32 times

I have used the following link to convert my factors to numeric, but get the following warning message. How can this be overcome?

typ_A <- c("2S", "3C", "3H", "4P", "4S", "5H", "CV", 
              "EX", "MV", "PU", "SW", "TR", "UV", "VN",
              "2C", "2S", "3C", "3H", "4P", "4S", "5H", "CV", 
              "EX", "MV", "PU", "SW", "TR", "UV")
typ_B <- c(1:28)

df1 <- data.frame(typ_A, typ_B)
df1$typ_A2 <- as.numeric(levels(df1$typ_A))[df1$typ_A]

edited May 23 '17 at 12:16

Community

asked Jan 31 '17 at 12:33

user08041991

2

How do you expect `"2S"` or `"3C"` to be numeric ? – Ronak Shah Jan 31 '17 at 12:35
to take the numeric 1, it is the first factor to appear – user08041991 Jan 31 '17 at 12:35
so we obtain 1:`length(unique(typ_A))` factors – user08041991 Jan 31 '17 at 12:36
1

Something like [this](http://stackoverflow.com/questions/41734401/assign-random-values-to-column-according-to-another-columns-values-in-r) ? – Ronak Shah Jan 31 '17 at 12:40
great, that was exactly it. link it below and I will close the question – user08041991 Jan 31 '17 at 12:42

Avoid: Warning message: NAs introduced by coercion

0 Answers0