subset,argo-method {oce} | R Documentation |
Subset an argo object, either by selecting just the "adjusted" data or by subsetting by pressure or other variables.
## S4 method for signature 'argo' subset(x, subset, ...)
x |
An object inheriting from |
subset |
An expression indicating how to subset |
... |
Ignored. |
If subset
is the string "adjusted"
, then subset
replaces the station variables with their adjusted counterparts. In
the argo notation, e.g. PSAL
is replaced with PSAL_ADJUSTED
;
in the present notation, this means that salinity
in the data
slot is replaced with salinityAdjusted
, and the latter is deleted.
Similar replacements are also done with the flags stored in the metadata
slot.
If subset
is an expression, then the action is somewhat similar
to other subset
functions, but with the restriction that
only one independent variable may be
used in in any call to the function, so that
repeated calls will be necessary to subset based on more than one
independent variable. Subsetting may be done by anything
stored in the data, e.g. time
,
latitude
, longitude
, profile
, dataMode
,
or pressure
or by profile
(a made-up variable)
or id
(from the metadata
slot).
An argo object.
Dan Kelley
Other things related to argo
data: [[,argo-method
,
[[<-,argo-method
, argo-class
,
argoGrid
, argoNames2oceNames
,
argo
, as.argo
,
handleFlags,argo-method
,
plot,argo-method
, read.argo
,
summary,argo-method
Other functions that subset oce
objects: subset,adp-method
,
subset,adv-method
,
subset,amsr-method
,
subset,cm-method
,
subset,coastline-method
,
subset,ctd-method
,
subset,echosounder-method
,
subset,lobo-method
,
subset,met-method
,
subset,oce-method
,
subset,odf-method
,
subset,rsk-method
,
subset,sealevel-method
,
subset,section-method
,
subset,topo-method
library(oce) data(argo) # Example 1: buset by time, longitude, and pressure par(mfrow=c(2,2)) plot(argo) plot(subset(argo, time > mean(time))) plot(subset(argo, longitude > mean(longitude))) plot(subset(argoGrid(argo), pressure > 500 & pressure < 1000), which=5) # Example 2: restrict attention to delayed-mode profiles. par(mfrow=c(1, 1)) plot(subset(argo, dataMode == "D")) # Example 3: contrast corrected and uncorrected data par(mfrow=c(1,2)) plotTS(argo) plotTS(subset(argo, "adjusted"))