Hi all, 1. How to construct a date from three variables year, month, and day, where all three are integers?
2. I have a dataframe by date and sector. I would like to add-up all entries for all variable with identical date and sector, replacing the original entries, i.e. emulate the STATA command "collapse (sum) var1 var2 var3, by(date sector)". Thank you, Serguei Kaniovski ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
