[R] changing values

[Philippe Grosjean]

Antonio Olinto wrote:

>Dear R list members,
>I have a factor vector with levels 1, 2, 3 and 4. I want to re-group it: 1
and 2 will be 1 and 3 and 4 will be 2, e.g.:
>x <- c(1, 1, 1, 2, 3, 2, 3, 4, ... )
>x <- factor(x)
>What I have to do create a new vector where 1 1 1 2 3 2 3 4 ... is
transformed in 1 1 1 1 2 1 2 2 ... ? (I have more than 200 lines in my
dataframe)
>Thanks in advance.

I don't know if it is the best way to do it, but it works:

x <- as.numeric(x)
x[x<=2] <- 1
x[x>2] <- 2
x <- as.factor(x)

Best regards,

Philippe Grosjean



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