Description Usage Arguments Value Author(s) See Also Examples
The creation of custom temporal aggregation levels (e.g., half-monthly,
monthly) from native 16-day MODIS composites usually requires the definition
of date sequences based on which the "composite_day_of_the_year" SDS is
further processed. Complementing transDate
, which returns the
respective start and end date only, this function creates full-year
(half-)monthly or annual composite periods from a user-defined temporal range.
1 | aggInterval(x, interval = c("month", "year", "fortnight"))
|
x |
|
interval |
|
A list
with the following slots:
$begin
: The start date(s) of each (half-)monthly timestep as
Date
object.
$end
: Same for end date(s).
$beginDOY
: Similar to $begin
, but with character
objects in MODIS-style date format (i.e., "%Y%j"; see strptime
).
$endDOY
: Same for end date(s).
Florian Detsch
1 2 3 4 5 6 7 8 9 10 11 12 | dates <- do.call("c", lapply(2015:2016, function(i) {
start <- as.Date(paste0(i, "-01-01"))
end <- as.Date(paste0(i, "-12-31"))
seq(start, end, 16)
}))
intervals <- c("month", "year", "fortnight")
lst <- lapply(intervals, function(i) {
aggInterval(dates, interval = i)
}); names(lst) <- intervals
print(lst)
|
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