Tena koe Satish I'm not entirely sure what you want, but did you check aggregate()?
HTH .... Peter Alspach > -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Vadlamani, > Satish {FLNA} > Sent: Friday, 6 November 2009 10:16 a.m. > To: 'R-help@r-project.org' > Subject: [R] Merge records in the same dataframe > > Hi: > > Suppose that I have a data frame as below > > x1 x2 x3 ... x10 wk1 wk2 ... Wk208 (these are the column names) > > For each record, x1, x2, x3 ... x10 are attributes. and wk1, > wk2, ..., wk208 are the sales recoreded for this attribute > combination. Suppose that now, that I want to do the following > > 1. Merge the data frame so that I have a new data frame > grouped by values of x2 and x3 (for example). That is, if two > records have the same values of x2 and x3, they should be summed. > > I tried to look at merge, tapply etc. but did not see a fit > with I want to do above. > > Thanks in advance. > > Satish > > ______________________________________________ > 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.
