[R] Bug in "transform"?

[Gabor Grothendieck]

Try:

cbind(mtcars, t1 = 3, t2 = 4)

On Tue, Dec 2, 2008 at 11:14 AM, Vitalie Spinu <vitosmail at rambler.ru> wrote:
> Dear useRs,
>
> Here is a weird behavior of transform function:
>
>  mtcars1<-matcars
>  transform(mtcars1,t1=3,t2=4)
> Error in data.frame(`_data`, e[!matched]) :
>  arguments imply differing number of rows: 32, 1
>
> instead, this works:
>
>  mtcars1$t1<-0
>  transform(mtcars1,t1=3,t2=4)
>
> also works if applied in turn:
>
>  transform(mtcars1,t1=3)
>  transform(mtcars1,t2=4)
>
> I often need to use this for creating new variables in data frame from those
> already present.
> Sorely needed!!
>
> Best,
> Vitalie.
>
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