[R] plm package index

Dear all, i just wonder if there´s a way to use a two column time index field in plm package. the manual says the following concerning data indexing: a character vector of length two containing the names of the individual and the time index, What would y´all do with a quarterly dataset

Re: [R] plm package index

From: Bunny, lautloscrew.com bu...@lautloscrew.com To: r-help@r-project.org Subject: [R] plm package index Message-ID: 9b6a22f4-5dd0-4fcd-9a6f-aee1e2108...@lautloscrew.com Content-Type: text/plain Dear all, i just wonder if there´s a way to use a two column time index field in plm package