zoo
zoo(x, order.by)
x
"index"
NROW(x)
plot
time
"zoo"
"ts"
"irts"
as.zoo
plot.zoo
index
x.date <- as.POSIXct(paste("2003-02-", c(1, 3, 7, 9, 14), sep = "")) x <- zoo(rnorm(5), x.date) plot(x) time(x) x[1:3]
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