[R] factor matrix
Mulholland, Tom
Tom.Mulholland at dpi.wa.gov.au
Fri Dec 3 07:03:50 CET 2004
I'm not sure, but is this what you want
matrix(as.numeric(factor(c(T,F,F,T))), 2,2)
Tom Mulholland
> -----Original Message-----
> From: Adrian Baddeley [mailto:adrian at maths.uwa.edu.au]
> Sent: Friday, 3 December 2004 1:45 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] factor matrix
>
>
> Sorry if this is a FAQ.
>
> Is there a good reason why a factor has to be
> a one-dimensional vector and cannot be a matrix?
>
> I want to construct matrices of categorical values.
>
> Vain attempts like
> matrix(factor(c(T,F,F,T), 2,2)
> yield a matrix of character strings representing the factor levels,
> not the levels themselves, while
> factor(matrix(c(T,F,F,T), 2,2))
> converts the matrix to a logical vector of length 4
> then converts the vector to a factor.
>
> Tia
> ---
> Adrian Baddeley
>
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