[R] Multiple Merge
Prof Brian Ripley
ripley at stats.ox.ac.uk
Tue Apr 8 15:45:00 CEST 2003
On Tue, 8 Apr 2003 TyagiAnupam at aol.com wrote:
> How to merge multiple dataframes with a common column? Merge takes only two
> dataframes as arguments.
> Something like:
> df <- merge(df1,df2,df3,...,by="ID")
Is that a unique ID the same values of which occur in all the dfs? Then
it is not a question of merging. Sort them all on ID and cbind them.
Otherwise you can merge df1 with df2, df12 with df3 etc.
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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