[R] plm package

Achim Zeileis Achim.Zeileis at wu-wien.ac.at
Sun Feb 8 22:55:22 CET 2009


> additionally to the question below, how I can get data into the 
> pdata.frame format, I have another question:
> Why doen't R recognize the function plm.data (), when calling it? I did 
> load the plm library before...

I suspect that you have an outdated version of "plm" and possibly R as 
well. (You don't supply either version although the posting guide asks you 
to.) plm version 1.0-1 is current.

The function pdata.frame() was removed and part of its functionality moved 
to the function plm.data() (in version 0.2-2, I think).

For a discussion, see the Journal of Statistical Software paper by the 
authors of the plm package:
   Yves Croissant, Giovanni Millo
   Panel Data Econometrics in R: The plm Package


> Greetz, Kirsten
> How do I actually manage to get data into the pdata.frame format?
> i.e. how do I declare id and time? I already tried various things and got even more error messages. for example
>> country <- c("AGO","BWA","DRC","LSO","MDG","MWI","MUS","MOZ","NAM","SYC","ZAF","SWZ","TZA","ZMB","ZWE")
>> time1 <- c(1991:2006)
>> pdata.frame(EMPR1,id=country,time=time1)
> serie SYC  is NA and has been removed
> Fehler in (function(x, i) if (is.matrix(i)) as.matrix(x)[[i]] else .subset2(x,  :
>        rekursives Indizieren auf Level 2 fehlgeschlagen
> where EMPR is a data.frame with 16 rows (time) and 15 columns (countries).
> Thank you,
> Kirsten
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