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2013 Feb 18
1
Calculating seasonal anomalies
...unction or use one of the apply functions, but I would greatly appreciate any help on how this can be achieved. # sample of data frame > dput(head(Dat, 10)) structure(list(open_date = structure(c(11742, 11966, 11987, 12001, 12015, 12029, 12043, 12064, 12085, 12099), class = "Date"), Dry_w = c(2.4, 14.05, 28.55, 20.76, 18.6, NA, 20.72, 18.47, 12.42, 25.57), PP_int = c(NA, 1281.52, 1352.15, 1333.05, 959.6, 738.24, 176.73, NA, 108.61, 518.42)), .Names = c("open_date", "Dry_w", "PP_int"), row.names = 166:175, class = "data.frame") # monthly cl...