[R] From strings to numbers

[Chuck Cleland]

On 5/19/2008 6:13 AM, Naira wrote:
> Dear all,
> 
> I would like to know if there is an easy to transform a vector of strings to
> a vector of integers.
> Ex: 
> ("ab","ab","bb","cat","cat","ab") will be
> (1, 1, 2, 3, 3, 1)

X <- c("ab","ab","bb","cat","cat","ab")

as.numeric(as.factor(X))

[1] 1 1 2 3 3 1

> Thx,
> Naira 

-- 
Chuck Cleland, Ph.D.
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