Hi, I'm struggling to understand the documentation.
?lag.zoo x - a "zoo" object. k, lag - the number of lags (in units of observations). Note the sign of k behaves as in lag. differences - an integer indicating the order of the difference. What does the above line actually mean? I've tried a few settings on sample data but can't figure out what it is doing. x <- iris x$Species = NULL x$Petal.Width = NULL x$Sepal.Width = NULL x$Sepal.Length = NULL x <- zoo(x) x <- merge(orig = x ,lag1diff2 = diff(x, lag = 1, differences = 2, arithmetic = TRUE, na.pad = TRUE) ,lag2diff1 = diff(x, lag = 2, differences = 1, arithmetic = TRUE, na.pad = TRUE) ,lag2diff2 = diff(x, lag = 2, differences = 2, arithmetic = TRUE, na.pad = TRUE) ) head(x) -- View this message in context: http://r.789695.n4.nabble.com/Lags-and-Differences-of-zoo-Objects-tp2308666p2308666.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.
