[R] Convert list of lists <--> data frame

[Henrique Dallazuanna]

Oh, you are rigth Marc, thanks.

Another option is:

pats.df <- do.call(rbind.data.frame, pats)

On Wed, Jul 23, 2008 at 1:10 PM, Marc Schwartz
<marc_schwartz at comcast.net> wrote:
> on 07/23/2008 09:42 AM Henrique Dallazuanna wrote:
>>
>> Try this:
>>
>> pats.df <- do.call(rbind, pats)
>
> Henrique,
>
> Take note of the object that results from this:
>
>> do.call(rbind, pats)
>     shape shape.col shape.lty cell.fill back.fill label label.size
> [1,] 0     "black"   1         "white"   "white"   1     1
> [2,] 0     "black"   1         "pink"    "white"   1     1
> [3,] 0     "black"   1         "red"     "white"   1     1
>     ref.col  ref.grid scale.max
> [1,] "gray80" "yes"    100
> [2,] "gray80" "yes"    100
> [3,] "gray80" "yes"    100
>
>
>> str(do.call(rbind, pats))
> List of 30
>  $ : num 0
>  $ : num 0
>  $ : num 0
>  $ : chr "black"
>  $ : chr "black"
>  $ : chr "black"
>  $ : num 1
>  $ : num 1
>  $ : num 1
>  $ : chr "white"
>  $ : chr "pink"
>  $ : chr "red"
>  $ : chr "white"
>  $ : chr "white"
>  $ : chr "white"
>  $ : num 1
>  $ : num 1
>  $ : num 1
>  $ : num 1
>  $ : num 1
>  $ : num 1
>  $ : chr "gray80"
>  $ : chr "gray80"
>  $ : chr "gray80"
>  $ : chr "yes"
>  $ : chr "yes"
>  $ : chr "yes"
>  $ : num 100
>  $ : num 100
>  $ : num 100
>  - attr(*, "dim")= int [1:2] 3 10
>  - attr(*, "dimnames")=List of 2
>  ..$ : NULL
>  ..$ : chr [1:10] "shape" "shape.col" "shape.lty" "cell.fill" ...
>
>> is.data.frame(do.call(rbind, pats))
> [1] FALSE
>
>> class(do.call(rbind, pats))
> [1] "matrix"
>
>
> There is an extra level of manipulation required, as I noted in my reply:
>
>> str(do.call(rbind, lapply(pats, data.frame)))
> 'data.frame':   3 obs. of  10 variables:
>  $ shape     : num  0 0 0
>  $ shape.col : Factor w/ 1 level "black": 1 1 1
>  $ shape.lty : num  1 1 1
>  $ cell.fill : Factor w/ 3 levels "white","pink",..: 1 2 3
>  $ back.fill : Factor w/ 1 level "white": 1 1 1
>  $ label     : num  1 1 1
>  $ label.size: num  1 1 1
>  $ ref.col   : Factor w/ 1 level "gray80": 1 1 1
>  $ ref.grid  : Factor w/ 1 level "yes": 1 1 1
>  $ scale.max : num  100 100 100
>
>
> HTH,
>
> Marc
>



-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O