This class stores current meter data, e.g. from an Interocean/S4 device
or an Aanderaa/RCM device. A file
containing Interocean/S4 data may be read with read.cm.
Alternatively, as.cm can be used to create cm objects.
Objects of this class can be
plotted with plot,cm-method or summarized with
summary,cm-method.
dataAs with all oce objects, the data slot
for cm objects is a
list containing the main data for the object.
The key items stored in this slot are time, u and v.
metadataAs with all oce objects, the metadata slot
for cm objects is a list containing
information about the data or about the object itself.
processingLogAs with all oce objects, the processingLog slot
for cm objects is a
list with entries describing the creation and evolution
of the object. The contents are updated by various oce functions to
keep a record of processing steps. Object summaries and
processingLogShow both display the log.
Although the [[<- operator may permit modification of the contents
of cm objects (see [[<-,cm-method),
it is better to use oceSetData
and oceSetMetadata, because that will save an entry
in the processingLog to describe the change.
The full contents of the data and metadata slots of a cm
object named cm may be retrieved in the standard R way. For example,
slot(cm, "data") and slot(cm, "metadata") return
the data and metadata slots, respectively. The
[[,cm-method operator can also be used to access slots,
with cm[["data"]] and cm[["metadata"]], respectively.
Furthermore, [[,cm-method can be used to retrieve
named items (and potentially some derived items) within the
metadata and data slots, the former taking precedence
over the latter in the lookup. It is also possible
to find items more directly, using oceGetData and
oceGetMetadata, but this cannot retrieve derived items.
Other things related to cm data: [[,cm-method,
[[<-,cm-method, as.cm,
cm, plot,cm-method,
read.cm, rotateAboutZ,
subset,cm-method,
summary,cm-method
Other classes provided by oce: adp-class,
adv-class, argo-class,
bremen-class,
coastline-class, ctd-class,
lisst-class, lobo-class,
met-class, oce-class,
odf-class, rsk-class,
sealevel-class,
section-class, topo-class,
windrose-class