window.oce {oce} | R Documentation |
Window an oce object by time or distance
## S3 method for class 'oce' window(x, start = NULL, end = NULL, frequency = NULL, deltat = NULL, extend = FALSE, which=c("time","distance"), indexReturn=FALSE, debug=getOption("oceDebug"), ...)
x |
an |
start |
the start time (or distance) of the time (or space) region of interest. This may be a single value or a vector. |
end |
the end time (or distance) of the time (or space) region of interest. This may be a single value or a vector. |
frequency |
not permitted yet. |
deltat |
not permitted yet |
extend |
not permitted yet |
which |
string containing the name of the quantity on which sampling is
done. Possibilities are |
indexReturn |
boolean flag indicating whether to return a list of the
"kept" indices for the |
debug |
a flag that turns on debugging. |
... |
ignored |
Windows x
on either time or distance, depending on the
value of which
. In each case, values of start
and
end
may be integers, to indicate a portion of the time or
distance range. If which
is "time"
, then the
start
and end
values may also be provided as POSIX
times, or character strings indicating times (in time zone
given by the value of getOption("oceTz")
).
Normally, this is new oce
object. However, if
indexReturn=TRUE
, the return value is two-element list containing
items named index
and indexSlow
, which are the indices for
the time
entry of the data
slot (and the timeSlow
, if
it exists).
Dan Kelley
subset
provides more flexible selection of subsets.
library(oce) data(adp) plot(adp) early <- window(adp, start="2008-06-26 00:00:00", end="2008-06-26 12:00:00") plot(early) bottom <- window(adp, start=0, end=20, which="distance") plot(bottom)