Well if I understand correctly you want data.csv$m <- rowSums(data.csv[, c(7,12,57,45)])
If you want something else please read Posting Guide and provide at least part of your data and the result you want. In the meantime It would be good for you to read at least R intro document provided with your R installation. Petr > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of rajib prasad > Sent: Friday, August 23, 2013 12:18 PM > To: r-help@r-project.org > Subject: [R] (no subject) > > I am new to R. I have a data like: > > x y z w p > .......... m > 1 10 15 20 25 30 > 2 11 16 21 26 31 > 3 12 17 18 19 20 > 4 51 52 53 55 67 > ....... > > thus I have 145 rows and 160 column in my data which is named as > data.csv. Now i want to create a new column 'm' and for every row m > will take value =column 7+ column 12+ column 57+ column 45 i.e. for > every row it will take value of sum of corresponding row's 7 & 12 & 57 > & 45 column's value . > So, how to write the code for this operation? > > > > > > -- > > > > RAJIB PRASAD > > Centre for Economic Studies & Planning > Jawaharlal Nehru University > New Delhi-67 > contact no: 09868320368 > mail id: rwho2...@gmail.com > > ______________________________________________ > 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.
