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2009 Dec 22
1
Using zoo() to aggregate daily data to monthly means
...ing zoo(). I have found an odd problem, that seems to be caused by zoo()'s handling of leap years. Here's my R script with 2 methods (freq=365, 366) for aggregating the daily data to monthly series: library(zoo) J_link <- "http://www.ijis.iarc.uaf.edu/seaice/extent/plot.csv" JAXA_data <- read.table(J_link, skip = 0, sep = ",", dec=".", row.names = NULL, header = FALSE, as.is = T, colClasses = rep("numeric",4), comment.char = "#", na.strings = c("*", "-",-99.9, -9999...