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...o unsubcribe this email to the R help mailing list because I need to create an email only for this mailing list. My email account doesn't have that much space anymore and I don't have access to this every day. How can I do that? Thanks a lot -- Bárbara H. Costa Marine Biologist Researcher SCIAENA - Marine Sciences and Cooperation www.sciaena.org ISPA | http://www.ispa.pt/ui/uie/index.asp BIOMARES | http://www.ccmar.ualg.pt/biomares/ MSI-UCSB | http://www.msi.ucsb.edu/ bcosta@ispa.pt barbarahcosta@gmail.com [[alternative HTML version deleted]]

...only with if but it is only for 1 length and the error was: the condition has length > 1 and only the first element will be used This question seemed easy in the beginning but I was not successful. Thanks a lot for helping me. Barbara -- Bárbara H. Costa Marine Biologist Researcher SCIAENA - Marine Sciences and Cooperation www.sciaena.org bcosta@ispa.pt barbarahcosta@gmail.com [[alternative HTML version deleted]]

...as count I also tried to make a F.Aggregate.DFrame(df [,2],df[,c(1,3,4)],length) but it doesn't work. Do you have some suggestions? I'd really like to learn doing it in R and not having to shift to excell! Thanks a lot, Cheers, Barbara -- Bárbara H. Costa Marine Biologist Researcher SCIAENA - Marine Sciences and Cooperation www.sciaena.org ISPA | http://www.ispa.pt/ui/uie/index.asp BIOMARES | http://www.ccmar.ualg.pt/biomares/ MSI-UCSB | http://www.msi.ucsb.edu/ bcosta@ispa.pt barbarahcosta@gmail.com [[alternative HTML version deleted]]

...only with if but it is only for 1 length and the error was: the condition has length > 1 and only the first element will be used This question seemed easy in the beginning but I was not successful. Thanks a lot for helping me. Barbara -- B?rbara H. Costa Marine Biologist Researcher SCIAENA - Marine Sciences and Cooperation www.sciaena.org bcosta at ispa.pt barbarahcosta at gmail.com [[alternative HTML version deleted]] ------------------------------ Message: 38 Date: Mon, 04 May 2009 19:24:33 +0200 From: "andrea.spano at quantide.com" <andrea.spano at quantide.com...