Hi All, I have a data frame (myframe) with variables (columns) A,B,C and 100 records (rows) for each. Column A is numeric. I would like to append a column to myframe that subtracts the value in row 24 of A from row 1 of A. In this procedure the first 23 rows of the new column will necessarily be blank (NA). Can anyone provide guidance for me here?
Thanks in advance for your time. Nick -- View this message in context: http://r.789695.n4.nabble.com/How-to-perform-arithmetic-across-rows-tp3017905p3017905.html Sent from the R help mailing list archive at Nabble.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.
