Hi, it works for me with plyr version 0.1.9. Try upgrading to the latest version, or post your sessionInfo()
HTH, baptiste 2009/9/25 Veerappa Chetty <chett...@gmail.com>: > Hi,I am using the amazing package 'plyr". I have one problem. I would > appreciate help to fix the following error: Thanks. > ______________________________ > >> library(plyr) >> data(baseball) >> summarise(baseball, > + duration = max(year) - min(year), > + nteams = length(unique(team))) > Error: could not find function "summarise" >> ddply(baseball, "id", summarise, > + duration = max(year) - min(year), > + nteams = length(unique(team))) > Error in llply(.data = .data, .fun = .fun, ..., .progress = .progress) : > object "summarise" not found > -------------------------------------------- > > -- > Professor of Family Medicine > Boston University > Tel: 617-414-6221, Fax:617-414-3345 > emails: chett...@gmail.com,vche...@bu.edu > > [[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. > ______________________________________________ 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.
