Try this: unique(transform(df, quantity = ave(quantity, client, date, name, FUN = sum), branch = NULL))
On Wed, Jan 26, 2011 at 8:39 AM, analys...@hotmail.com < analys...@hotmail.com> wrote: > I have > > > df > quantity branch client date name > 1 10 1 1 2010-01-01 one > 2 20 2 1 2010-01-01 one > 3 30 3 2 2010-01-01 two > 4 15 4 1 2010-01-01 one > 5 10 5 2 2010-01-01 two > 6 20 6 3 2010-01-01 three > 7 1000 1 1 2011-01-01 one > 8 2000 2 1 2011-01-01 one > 9 3000 3 2 2011-01-01 two > 10 1500 4 1 2011-01-01 one > 11 1000 5 2 2011-01-01 two > 12 2000 6 3 2011-01-01 three > > I want to aggregate away the branch. I followed a suggestion by Gabor > (thanks) and did > > > > aggregate(list(quantity=df$quantity),list(client=df$client,date=df$date),sum) > client date quantity > 1 1 2010-01-01 45 > 2 2 2010-01-01 40 > 3 3 2010-01-01 20 > 4 1 2011-01-01 4500 > 5 2 2011-01-01 4000 > 6 3 2011-01-01 2000 > > I want df$name also in the output and did what looked obvious: > > > > aggregate(list(quantity=df$quantity),list(client=df$client,date=df$date,name=df$name),sum) > client date name quantity > 1 1 2010-01-01 one 45 > 2 1 2011-01-01 one 4500 > 3 3 2010-01-01 three 20 > 4 3 2011-01-01 three 2000 > 5 2 2010-01-01 two 40 > 6 2 2011-01-01 two 4000 > > It seems to work, but slows down tremendously for a dataframe with > around a 1000 rows. > > Could anyone explain what is going on and suggest a way out? > > Thanks. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
