[R] Time series panel

From: GRAHAM LEASK <grahamleask_at_btopenworld.com>
Date: Fri, 07 Mar 2008 17:39:24 +0000 (GMT)

I have a set of data that consists of a number of biological measurements.    

  The columns are Time that runs from 01/01/2005 to 01/5/2007, Group which has 23 levels and postcode which is nested within group. This is a balanced panel but the number of postcodes differs within groups, from 15 to 400. The rest of this data consists of a number of columns of quantitative measures, largely counts.    

  I would like to set this up as a dataframe but retain the time series element and the structural relations within the data. How can I do this in R?    

  Whenever I try ts I end up with things out of order without the time series element.correctly represented    

  Secondly assuming that I wish to regress temperature against vegetation and type how do I express this as a linear hierarchical model nesting postcode within group but keeping time as non nested (eg group x time) with calendar time as a group level predictor?    

  Any help would be most appreciated.            

  Graham Leask

Kind regards

Dr Graham Leask
Economics and Strategy Group
Aston Business School
Aston University
Aston Triangle
B4 7ET

Tel: Direct line 0121 204 3150
Fax: 0870 759 8408
email g.leask_at_aston.ac.uk

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