Message-ID: <CAB7CB2F-878C-428A-8433-7EDC80B48052@comcast.net>
Date: 2009-01-17T17:22:18Z
From: David Winsemius
Subject: converting a factor in numeric values with direct control of the numeric values
In-Reply-To: <87644ED2-53CD-4ABA-A2A4-34EC60498508@licht-malerei.de>
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, J?rg Gro? 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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