> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Yellow > Sent: Thursday, April 12, 2012 2:18 AM > To: r-help@r-project.org > Subject: [R] How insert data to a column in existing csv file? > > I was working with some excel files with a lot of data. > And by hand it is impossible to handle them. > So they are now converted to .csv. > > With headers above the columns, like: > Data1, Data2, Data3 > > But now I needed to calculate the log2 value of Data1 and place the > result > under Data2. > I can't find how to do that. > Does anyone else know? > > I have the log2 values, but how do I get then inside the .csv file > under > Data2? > > I already tried write.table(), buy that wasn't it. > And I am kinda stuck on this now..... > >
In the absence of a reproducible example, we can only guess. My guess is that you should read the csv file into a data frame, add or modify your variable(s), then write out a new csv file. Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 ______________________________________________ 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.
