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, debug=FALSE)
file |
A connection or a character string giving the name of the file to load. |
debug |
Set to TRUE to get debugging information during processing. |
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: the tabular format used at the Hawaii archive
centre, or the comma-separated-value format used by the Marine Environmental Data Service. If the
file is in neither of these known formats, the user might wish to scan the data by some other
means, and then to use as.sealevel
to create the sealevel
object.
A sealevel
object containing
header |
The header line (helpful if detail extraction failed) |
station.number |
identifier for the station. |
station.version |
see online docs at site mentioned in References. |
station.name |
name of station |
region |
a region code. |
year |
year in which the observations were made. |
latitude |
latitude, decimal degrees, positive north of equator. |
longitude |
longitude, decimal degrees, positive east of Greenwich. |
GMT.offset |
offset from GMT time. |
decimation.method |
see online docs at site mentioned in References. |
reference.offset |
a reference offset; see online docs at site mentioned in References. |
reference.code |
a reference code; see online docs at site mentioned in References. |
units |
unit of observations (normally "MM") |
n |
number of observations |
data |
a list containing t , times of observations and eta , the sealevel observations, in units units (normally, mm) |
processing.log |
a processing log. |
Dan Kelley Dan.Kelley@Dal.Ca
The Hawaii archive site at http://ilikai.soest.hawaii.edu/uhslc/datai.html provides a graphical interface for downloading sealevel data; the format is described at ftp://ilikai.soest.hawaii.edu/rqds/hourly.fmt. The MEDS data are at http://www.meds-sdmm.dfo-mpo.gc.ca/meds/Databases/TWL/TWL_inventory_e.htm.
The generic function read.oce
provides an alternative to this.
A sealevel
object may be summarized with summary.sealevel
and plotted with
plot.sealevel
.
A sealevel
object can also be constructed with as.sealevel
.
## Not run: library(oce) h <- read.sealevel("ftp://ilikai.soest.hawaii.edu/rqds/pacific/monthly/m652a.dat") summary(h) plot(h) ## End(Not run)