[R] contingency table

[Henrique Dallazuanna]

I don't know if this you want but, you can try:

 table(data.frame(prev, iris$Species))

On 14/02/2008, Carla Rebelo <crebelo at liaad.up.pt> wrote:
> Hello!
>
>  May you help me? I'm trying to do a contingency table using this
>
>   > data(iris)
>   > library(rpart)
>   > modelo <- rpart(Species ~., iris)
>   > prev <- predict(modelo, iris)
>
>  Finally the contingency table
>   > table(iris$Species, prev)
>  But an error occurs:
>  Error in table(iris$Species, prev) :
>   all arguments must have the same length
>
>  And I do not understand why, may you help me?
>
>  Thank You!
>
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-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O