I have two data frames. One with a matrix of months and the other with a matrix of values. The two dataframes correspond to each other. I would like to sum up all the values in by month.
What would be an efficient way to do this? a=C(2,3,5,2,3,5) b=c(2,6,3,2,6,3) c=c(2,6,7,2,6,5) months <- data.frame(a,b,c) a=C(200,345,5435,27456,3343,555) b=c(288,699,377,234,6354,33454) c=c(2345,6345,79678,245,676,5089) values <- data.frame(a,b,c) -- View this message in context: http://r.789695.n4.nabble.com/conditional-sum-two-dataframes-tp4637986.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.
