Extract The Start of an Oce Object
This function handles the following object classes directly:
'>adp,
'>adv,
'>argo (selection by profile),
'>coastline,
'>ctd,
'>echosounder (selection by ping),
'>section (selection by station)
and
'>topo (selection by longitude and latitude).
It does not handle
'>amsr or
'>landsat
yet, instead issuing a warning and returning x in those cases.
For all other classes, it calls head()
with n as provided, for each item in the data
slot, issuing a warning if that item is not a vector; the
author is quite aware that this may not work well for all classes.
The plan is to handle all appropriate classes by July 2018.
Please contact the author if there is a class you need handled
before that date.
# S3 method for oce
head(x, n = 6L, ...)Number of elements to extract, as for head().
ignored
tail.oce(), which yields the end of an oce object.