[R] how to split data.frame by row?

[Peter Dalgaard]

Weiwei Shi wrote:
> Thanks.
>
> but I need to make it into a more general case instead of that example
>
>   
How about this?

 > reshape(data.frame(df,expand.grid(id=1:10,time=1:2)), direction="wide")
   id         x.1         y.1        z.1         x.2        y.2        z.2
1   1 -1.33527134 -0.31893666  1.1345717  0.13601140 -0.5210235 -1.6453668
2   2 -0.40199177 -0.26278190  1.5228152  0.53208796  0.5255562  0.3267309
3   3  0.05619911  0.31990391 -1.2611666 -1.15608383  0.5201109  1.5253689
4   4  1.66916616  1.08395276  0.1919081 -1.15959007 -0.1003595  2.1030876
5   5  0.11075134 -0.36423367  0.9654529  0.04113644  0.5835345 -0.7564126
6   6 -1.19880026 -1.39391323 -1.7280456 -0.24469238  0.3751702  1.1757113
7   7 -0.85106477 -0.85565217  0.7824827 -0.27263427  0.5162566 -1.8809751
8   8 -0.38502496 -0.00947673 -0.5980507 -1.52106344 -0.6601541  1.1867183
9   9  1.28152185  1.73403122 -0.1958194 -0.37358099 -2.3842039 -0.2761239
10 10  1.47900233 -0.83444107  0.5078372  1.62086099  1.9920449 -1.9054037



> On 10/29/07, Henrique Dallazuanna <wwwhsd at gmail.com> wrote:
>   
>> If I understand your question:
>>
>> df <- data.frame(x=rnorm(20), y=rnorm(20), z=rnorm(20))
>> df <- as.matrix(df)
>> dim(df)
>> dim(df) <- c(10,6)
>> dim(df) <- c(5,12)
>>
>> On 29/10/2007, Weiwei Shi <helprhelp at gmail.com> wrote:
>>     
>>> hi,
>>>
>>> if I have 20 x 3 data.frame, how to split it into
>>> 10 x 6 (moving the lower part of 10x3 to column)
>>>
>>> or
>>>
>>> 5 x 12
>>>
>>> thanks
>>>
>>> --
>>> Weiwei Shi, Ph.D
>>> Research Scientist
>>> GeneGO, Inc.
>>>
>>> "Did you always know?"
>>> "No, I did not. But I believed..."
>>> ---Matrix III
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
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>>> PLEASE do read the posting guide
>>>       
>> http://www.R-project.org/posting-guide.html
>>     
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>>       
>>
>> --
>> Henrique Dallazuanna
>> Curitiba-Paraná-Brasil
>> 25° 25' 40" S 49° 16' 22" O
>>     
>
>
>   


-- 
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
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