Hi
Usually "aggregate" is used to calculate things such as the sum of all data on the first day, the sum next day, and so on. But how can I calculate the mean of the first hour of all days, the mean of the second hour of all days, and so on. ??? That's Most examples: today at 1am + today at 2am + today at 3am +.... -> sum today tomorrow at 1am + tomorrow at 2am + tomorrow at 3am +.... -> sum tomorrow .................. aggregate(data, as.Date,sum) But what I need is: data today at 1 + data tomorrow at 1 + data in two days at 1 + ..... -> sum at 1am data today at 2 + data tomorrow at 2 + data in two days at 2 + ..... -> sum at 2am data today at 3 + data tomorrow at 3 + data in two days at 3 + ..... -> sum at 3am ............. How can I do it?? cheers -- View this message in context: http://r.789695.n4.nabble.com/Different-way-of-aggregating-tp2330497p2330497.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.
