[R] how to merge list of dataframes?

[baptiste auguie]

have you tried do.call(rbind, aa) , or perhaps do.call(merge, aa) ?

Hope this helps,

baptiste

On 15 Dec 2008, at 13:23, 江文恺 wrote:

>
> Dear all:
>
> I have a list of dataframes like this, i try to merge this lists of  
> dataframes into one single dataframe, and keep ther column names as  
> usual, how can i do this?
>
> i try lapply(aa,rbind), but it dose not work.
>
> Best regard!
>
>> summary(aa)
>       Length Class      Mode
>  [1,] 3      data.frame list
>  [2,] 3      data.frame list
>  [3,] 3      data.frame list
>  [4,] 3      data.frame list
>  [5,] 3      data.frame list
>  [6,] 3      data.frame list
>  [7,] 3      data.frame list
> ...
>
>> aa[1]
> [[1]]
>        b     p         d
> 1    1  pair1 1.07293
> 2    1  pair2 1.74022
> 3    1  pair3 4.17572
> 4    1  pair4 1.52449
> 5    1  pair5 1.63937
> 6    1  pair6 4.36470
> 8    1  pair8 1.17507
> 10   1 pair10 0.41672
> 11   1 pair11 3.62334
>
>> aa[2]
> [[1]]
>        b       p       d
> 13   2 pair13 1.12680
> 14   2 pair14 1.41834
> 15   2 pair15 1.94462
> 16   2 pair16 4.97495
> 17   2 pair17 2.49566
> 18   2 pair18 6.76947
> 19   2 pair19 1.81448
> 20   2 pair20 6.25511
>
>> aa[3]
> [[1]]
>        b    p         d
> 21   3 pair21  2.67789
> 22   3 pair22  1.57610
> 24   3 pair24  0.63215
> 25   3 pair25  0.79549
> 26   3 pair26  1.71219
> 27   3 pair27 39.29264
>
>
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_____________________________

Baptiste Auguié

School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK

Phone: +44 1392 264187

http://newton.ex.ac.uk/research/emag