[R] converting a factor in numeric values with direct control of the numeric values

[David Winsemius]

ifelse is your friend:

 > z <- c("male", "male", "female")
 >  z <- as.factor(z)
 >
 >  z <- ifelse(z == "male", 3, 5)

 > z
[1] 3 3 5
 > class(z)
[1] "numeric"
 >

--  
David Winsemius

On Jan 17, 2009, at 11:40 AM, Jörg Groß wrote:

> Hi,
>
> I know how to convert a factor-variable into a numeric variable via  
> as.numeric().
>
> But how can I control the values that are assigned?
>
>
> For example, I have this factor-variable:
>
>
> z <- c("male", "male", "female")
> z <- as.factor(z)
>
>
> And I want to convert male in 3 and female into the numeric value 5  
> (just for the example)
>
> so that I get:
>
> [1] 3 3 5
>
>
> Thanks for any help!
>
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