oce (version 0.1-75)

as.ctd: Coerce data into ctd dataset

Description

Coerces a dataset into a ctd dataset.

Usage

as.ctd(S, t, p, ship=NA, scientist=NA, institute=NA, address=NA,
cruise=NA, station=NA, date=NA, start.time=NA, 
latitude=NA, longitude=NA, recovery=NA, water.depth=NA, 
sample.interval=NA, src="")

Arguments

S

Salinity through the water column.

t

Temperature through the water column.

p

pressure through the water column.

ship

optional string containing the ship from which the observations were made.

scientist

optional string containing the chief scientist on the cruise.

institute

optional string containing the institute behind the work.

address

optional string containing the address of the institute.

cruise

optional string containing a cruise identifier.

station

optional string containing a station identifier.

date

optional string containing the date at which the profile was started.

start.time

optional string containing the start time.

latitude

optional numerical value containing the latitude in decimal degrees, positive in the northern hemisphere.

longitude

optional numerical value containing longitude in decimal degrees, positive in the eastern hemisphere.

recovery

optional string indicating the recovery time.

water.depth

optional numerical value indicating the water depth in metres.

sample.interval

optional numerical value indicating the time between samples in the profile.

src

optional string indicating data source

Value

• An object of class "ctd" (for details, see read.ctd).

Details

A common use is to assemble (S,t,p) vectors into a ctd object, e.g. so that plot.ctd can be used to make a standard four-panel plot, or so that a section can be constructed with make.section.

See Also

A file containing CTD profile data may be read with read.ctd. A ctd object may be summarized with summary.ctd. Overview plots may be made with plot.ctd, while plot.TS produces TS plots and plot.ctd.scan produces scan plots that may help with data editing. Extraneous data such as those collected during upcasts and equilibration intervals may be trimmed with ctd.trim, and the data may be cast onto specified pressure levels with ctd.decimate. Low-level manipulation may be done with ctd.add.column and ctd.update.header, as well as by direct manipulation of the items within ctd objects.

Examples

library(oce)
p <- seq(0,100,1)
T <- 10 - p / 100
S <- 35 - p / 100
ctd <- as.ctd(S, T, p)
summary(ctd)