[R] R-how to group the data

[Gabor Grothendieck]

If your data frame is X then

unstack(X, value ~ type)

gives you a list with x and y components.  If you need
these as variables try attach(unstack(X, value ~ type))
or

with(unstack(X, value ~ type, {
  ... some computations ...
}


On 12/9/05, Subhabrata <subhabratapal at sraindia.com> wrote:
>
> Hello R - users,
>
> This may sound simple to may people:
>
> I have a list of data as follows
>
>     type value
>      y 7
>      y 7
>      y 8
>      y 8
>      y 8
>      y 9
>      y 9
>      y 9
>      y 9
>      y 10
>      y 10
>      y 10
>      y 10
>      y 11
>      y 11
>      y 12
>      y 12
>      y 14
>      y 14
>      y 14
>      y 15
>      y 17
>      y 20
>      y 20
>      y 20
>      y 20
>      y 25
>      y 25
>      y 25
>      x 7
>      x 7
>      x 8
>      x 8
>      x 9
>      x 9
>      x 11
>      x 11
>      x 11
>      x 12
>      x 12
>      x 12
>      x 13
>      x 13
>      x 15
>      x 15
>      x 15
>      x 18
>      x 20
>      x 30
>      x 30
>
> Is there any way where I can group all the x and y like
>
> a <- all the values of x
> b <- all the values of y
>
> so 'a' will  have = 7, 7, 8....
>    'b' = 7,7,8,8,8...
>
>
> With Regards
> Subhabrata Pal
>
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