[R] data frame

[Sean Davis]

On 12/22/05 9:11 AM, "Rhett Eckstein" <glaxowell at gmail.com> wrote:

> Dear R users:
> 
>> s4 <- seq(length=10, from=1, by=5)
>> s<-data.frame(s4,s4,s4)
> I would like to do some modification to s.
> And I want the form like the following,if it is possible, how should I do?
> The last column is the sum of previous three column.
>    s4 s4.1 s4.2    sum
> 1   1                    1
> 2    6                   6
> 3   11    1            12
> 4   16    6            22
> 5   21   11    1     33
> 6   26   16    6     48
> 7   31    21   11   63
> 8   36    26   16   78
> 9   41    31   21   93
> 10 46    36   26   108

Rhett,

You might want to look at ?embed.  It would need some modification, but you
can hopefully get the idea.

 embed(s4,3)

Sean