Hi, You could use either: Reduce(function(...) merge(...,by="date"),list(dat1,dat2,dat3,dat4)) #or library(reshape) merge_recurse(list(dat1,dat2,dat3,dat4), by="date") A.K.
----- Original Message ----- From: Vasilchenko Aleksander <vasilchenko....@gmail.com> To: r-help@r-project.org Cc: Sent: Monday, December 17, 2012 11:03 AM Subject: [R] Merge more than 2 dataframe Hello. I have for example 4 or more dataframe which like such this example: date value 2006-11 0.4577647 2006-12 NaN 2006-10 0.1577647 2006-11 0.3577647 2006-12 NaN 2007-01 NaN 2007-02 NaN 2007-03 0.2956429 2007-01 0.3677647 2007-02 NaN They have the same length. I need merge by date undefined number of dataframes. End result output will look like such example date name1 name2 name3 name4 .... 2006-11 0.4577647 0.4577647 0.4577647 NaN 2006-12 NaN NaN 0.4577647 0.4577647 2006-10 0.1577647 0.1577647 0.4577647 NaN 2006-11 0.3577647 0.8577647 0.4577647 0.4577647 2006-12 NaN 0.1577647 0.4577647 0.4577647 2007-01 NaN 0.2277647 NaN 0.1777647 2007-02 NaN 0.4577647 0.4577647 0.4477647 2007-03 0.2956429 NaN 0.4577647 0.1577647 2007-01 0.3677647 0.4577647 NaN7 0.4577647 2007-02 NaN 0.6577647 0.4577647 0.4577647 Sincerely yours, Aleksander ______________________________________________ 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.
