endpoints | R Documentation |
Extract index values of a given Raster*TS
object corresponding
to the last observations given a period specified by on
.
endpoints(x, on="months", k=1)
x |
a raster time series ( |
on |
the periods endpoints to find as a character string |
k |
along every k-th element - see notes |
This function is, indeed, endpoints
in xts that works with Raster*TS
objects. It returns a numeric vector corresponding to the last observation in each period specified by on
, with a zero added to the beginning of the vector, and the index of the last raster in x
at the end.
Valid values for the argument on
include: “us” (microseconds),
“microseconds”, “ms” (milliseconds),
“milliseconds”, “secs” (seconds),
“seconds”, “mins” (minutes), “minutes”,
“hours”, “days”, “weeks”, “months”, “quarters”,
and “years”.
A numeric vector of endpoints beginning with 0 and ending with a value equal to the number of raster layers in the x argument.
Windows support for subsecond periods is not supported.
Babak Naimi
endpoints
## Not run:
file <- system.file("external/ndvi", package="rts")
ndvi <- rts(file) # read the ndvi time series from the specified file
endpoints(ndvi,"years")
endpoints(ndvi,"quarters")
## End(Not run)
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