[R] pdata.frame for panel data

Hi there, as a newbie in R I have a question on the plm package for panel data: 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","

[R] pdata.frame for panel data

Hi there, as a newbie in R I have a question on the plm package for panel data: 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","