read.sealevel {oce} | R Documentation |
Read a data file holding sea level data. BUG: the time vector assumes GMT, regardless of the GMT.offset value.
read.sealevel(file, tz=getOption("oceTz"), processingLog, debug=getOption("oceDebug"))
file |
a connection or a character string giving the name of the file to load. See Details for the types of files that are recognized. |
tz |
time zone. The default value, |
processingLog |
if provided, the action item to be stored in the log. (Typically only provided for internal calls; the default that it provides is better for normal calls by a user.) |
debug |
set to |
This function starts by scanning the first line of the file,
from which it determines whether the file is in one of two known
formats: type 1, the format used at the Hawaii archive centre, and
type 2, the comma-separated-value format used by the Marine
Environmental Data Service. (The file type is inferred by checking
for the existence of the string Station_Name
on the first line
of the file, indicating type 2.) If the file is in neither of these
formats, the user might wish to scan it directly, and then to use
as.sealevel
to create a sealevel
object.
An object of class
"sealevel"
, which
is a list
containing
|
: a list containing
|
|
: a list containing
|
|
: a log of processing, in the standard |
Dan Kelley
The Hawaii archive site at
http://ilikai.soest.hawaii.edu/uhslc/datai.html
provides a graphical
interface for downloading sealevel data in Type 1, with format as described
at http://ilikai.soest.hawaii.edu/rqds/hourly.fmt
(this link
worked for years but failed at least temporarily on December 4, 2016). The MEDS
repository (http://www.isdm-gdsi.gc.ca/isdm-gdsi/index-eng.html)
provides Type 2 data.
The documentation for sealevel-class
explains the
structure of sealevel objects, and also outlines the other functions dealing
with them.
## Not run: library(oce) # this yields the sealevel dataset sl <- read.oce("h275a96.dat") summary(sl) plot(sl) m <- tidem(sl) plot(m) ## End(Not run)