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.