[R] Converting a pdataframe into dataframe

[Peter Ehlers]

Whoops, forgot one line of code; below.

On 2012-06-01 09:37, Peter Ehlers wrote:
> On 2012-06-01 07:09, Apoorva Gupta wrote:
>>> a<- data.frame(name=c(rep("a",5), rep("b",5)), year=c(1989:1993, 1989:1993), var=c(1:10))
>>> str(a)
>>> b<- pdata.frame(a, index=c("name","year"))
>>> str(b)
>> Now, I want to convert b into a data frame and have a structure
>> similar to a. How do I do that?
>
> I assume that pdata.frame() is the function in package plm.
> (You should say so.)
>
> The solution depends a bit on just how similar your new data
> frame should be to a.
>
> If you don't mind the attributes attached to each variable in b,
> then do just
>
>     new.b<- as.data.frame(b)
>
> which will invoke the as.data.frame.pdata.frame() function.
>
> If you want to strip the attributes, then this should do:
>
>     new.b<- lapply(b, function(x){attr(x, "index")<- NULL; x})

This produces a list; we still need

     new.be <- data.frame(new.b)

Peter

>
> In either case, 'year' will still be a factor and you may
> still wish to 'unfactor' it; see ?factor.
>
> Peter Ehlers
> --