as.oce(x, ...)as.coastline or ODF2oce, if these are used.as.oce returns an object inheriting from oce-class.
as.ctd to construct specialized oce sub-classes.as.oce creates an oce object from data contained within its
first argument, which may be a list, a data frame, or an object
of oce-class. (In the last case, x is
simply returned, without modification.)
If x is a list containing items named longitude and
latitude, then as.coastline is called (with
the specified ... value) to create a coastline object.
If x is a list created by read_odf from the (as
yet unreleased) ODF package developed by the Bedford Institute of
Oceanography, then ODF2oce is called (with
no arguments other than the first) to calculate a return value.
If the sub-class inference made by ODF2oce is
incorrect, users should call that function directly, specifying
a value for its coerce argument.
If x has not been created by read_odf, then the names
of the items it contains are examined, and used to try to infer
the proper return value. There
are only a few cases (although more may be added if there is
sufficient user demand). The cases are as follows.
x contains items named temperature,
pressure and either salinity or conductivity,
then an object of type ctd-class will be returned.
x contains columns named longitude and latitude,
but no other columns, then an object of class coastline-class
is returned.