[R] Help with list

[Gabor Grothendieck]

On Thu, Sep 26, 2013 at 2:02 PM, Sebastian Kruk <residuo.solow at gmail.com> wrote:
> I have a list that gives me the number of occurrences of numbers 1, 2, 3 and
>  4.
>
>
> Sometimes a single in a casa just appears 0 and 1, in others only 2, and every
> combination you can think of.
>
>
> Eg
>
>
>> Caso [1:2]
> $ `9`
>
>
> 0 1
> 2 10
>
>
> $ `13`
>
>
> 0 2
> 2 4
>
>
> Can I turn it into a matrix consisting of 4 columns in which I put the
> number of occurrences of the previous numbers, and for cases where it does
> not appear any of those values put 0?

When creating Caso make the components factors with levels 0:4.

dat <- list("9" = c(0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1), "13" = c(0,
0, 4, 4, 4, 4))
Caso <- lapply(dat, factor, levels = 0:4)
do.call(rbind, lapply(Caso, table))

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