[R] Splus equivalent of reshape in R

[David Winsemius]

On May 15, 2012, at 11:18 PM, Santosh wrote:

> Hello R/Splus users..
> I am posting in R discussion group in hope of wider response  
> compared to
> what I received from Splus user groups....
>
> Was wondering if there is any function available in Splus 8.2 that is
> equivalent to "reshape" of R?
>
> Below is a sample dataset. Size [both rows and columns) of the  
> dataset may
> vary
> X1        Y1    Y2    Y3
> 0.25    40    38    22
> 0.5        44    41    43
> 1        32    32    58
> 2        25  25    25
> 4        23    26    17
> 6        10    11    23
> 8        10 92 13
> 24        1.7 15 4.6

data.frame(id=rep(1:(length(dfrm)-1), each=NROW(dfrm)),
             x= rep(dfrm[["X1"]], times= length(dfrm)-1),
             y=unlist(dfrm[-1]) )

You could also just copy the code for reshape or stack and see if it  
succeeds. the code for stack.data.frame has some preparatory steps but  
finishes up with something very similar to above:

...
data.frame(values = unlist(unname(x)), ind = factor(rep.int(names(x),
         lapply(x, length))), stringsAsFactors = FALSE)

-- 
David.

>
> and I would like to have them stacked.... as shown below..
> id    x    y
> 1    0.25    40
> 1    0.5    44
> 1    1    32
> 1    2    25
> 1    4    23
> 1    6    10
> 1    8    10
> 1    24    1.7
> 2    0.25 38
> 2    0.5    41
> 2    1    32
> 2    2    25
> 2    4    26
> 2    6    11
> 2    8    92
> 2    24    15
> 3    0.25    22
> 3    0.5    43
> 3    1    58
> 3    2    25
> 3    4    17
> 3    6    23
> 3    8    13
> 3    24    4.6
>
>
> Thanks..
> santosh
>
> 	[[alternative HTML version deleted]]
>
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David Winsemius, MD
West Hartford, CT