tdrTrim: Trim start/end portions of a tdr cast

Description

Trim start/end portions of a tdr cast.

Usage

tdrTrim(x, method="water", parameters=NULL, debug=getOption("oceDebug"))

Arguments

A tdr object, e.g. as read by read.tdr.

method

Various methods exist, some of which use parameters: [object Object],[object Object],[object Object]

parameters

Depends on method; see above.

debug

a flag that turns on debugging. The value indicates the depth within the call stack to which debugging applies. For example, read.adv.nortek() calls read.header.nortek(), so that read.adv.nortek(...,debug=2)

`Value`

An object of class "tdr", with data
  having been trimmed in some way, and with the pressure being reduced
  by mean sea-level pressure.

`Details`

The "water" method is mainly for quick and dirty work.
  In many cases, the user will be working with several files, and so it
  will make sense to use the "time" method, to synchronize the
  time series.  Normally, notes will have been taken in the field, so no
  guessing need be done about the time the instruments went in the
  water.  In some cases, though, the time will have to be inferred from
  the data, and so it might make sense to start by trimming with the
  "water" method, after which summary.tdr is used
  to find the probably time when the instrument was put into the water.
  After the data are trimmed in time, the pressure record is modified by
  subtracting 10.1325~dbar, the average sea-level pressure.

`See Also`

The documentation for tdr-class explains the structure of
    PT objects, and also outlines the other functions dealing with them.

`Examples`

Run this codelibrary(oce)
data(tdr)
tdrTrimmed <- tdrTrim(tdr)
plot(tdrTrimmed)
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