[R] How to reshape this data frame from long to wide ?

[Gabor Grothendieck]

Not completely clear what you want (it does not appear to be a
conventional reshape) but try this:

> m <- matrix(c("A", "A", "B", "1", "2", "3"), 3, 2)
> structure(do.call(cbind, lapply(tapply(m[,2], m[,1], c), ts)), tsp = NULL, class = NULL)
     A   B
[1,] "1" "3"
[2,] "2" NA


On Sat, Feb 21, 2009 at 10:23 PM, Daren Tan <darentan76 at gmail.com> wrote:
> I tried cast and melt in reshape package, but still can't convert this data
> frame m
>
> m
>     [,1] [,2]
> [1,] "A"  "1"
> [2,] "A"  "2"
> [3,] "B"  "3"
> to this form.
>
> m1
>     [,1] [,2]
> [1,] "A"  "B"
> [2,] "1"  "3"
> [3,] "2"  NA
> Please help.
>
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