ad2cpHeaderValue: Decode an item from a Nortek AD2CP file header (an internal function)

Description

Decode an item from a Nortek AD2CP file header (an internal function)

Usage

ad2cpHeaderValue(x, key, item, numeric = TRUE, default)

Value

String or number interpreted from the x[["text"]], or NULL, if the desired item is not found there, or if x is not of the required class and variety.

Arguments

x: an adp object that holds AD2CP data.
key: Character value that identifies a particular line in the file header.
item: Character value indicating the name of the item sought.
numeric: Logical value indicating whether to convert the return value from a string to a numerical value.
default: Optional value to be used if the item is not found in the header, or if the header is NULL (as in the case of a split-up file that lacks the initial header information)

Author

Dan Kelley

Other things related to adp data: [[,adp-method, [[<-,adp-method, ad2cpCodeToName(), adp-class, adpAd2cpFileTrim(), adpConvertRawToNumeric(), adpEnsembleAverage(), adpFlagPastBoundary(), adpRdiFileTrim(), adp_rdi.000, adp, applyMagneticDeclination,adp-method, as.adp(), beamName(), beamToXyzAdpAD2CP(), beamToXyzAdp(), beamToXyzAdv(), beamToXyz(), beamUnspreadAdp(), binmapAdp(), enuToOtherAdp(), enuToOther(), handleFlags,adp-method, is.ad2cp(), plot,adp-method, read.adp.ad2cp(), read.adp.nortek(), read.adp.rdi(), read.adp.sontek.serial(), read.adp.sontek(), read.adp(), read.aquadoppHR(), read.aquadoppProfiler(), read.aquadopp(), rotateAboutZ(), setFlags,adp-method, subset,adp-method, subtractBottomVelocity(), summary,adp-method, toEnuAdp(), toEnu(), velocityStatistics(), xyzToEnuAdpAD2CP(), xyzToEnuAdp(), xyzToEnu()

Other things related to ad2cp data: ad2cpCodeToName(), adpAd2cpFileTrim(), is.ad2cp(), read.adp.ad2cp()

Examples

Run this code

if (FALSE) {
if (file.exists("a.ad2cp")) {
    d <- read.oce("a.ad2cp")
    # The examples start with the line in x[["text"]][[1]]; note that in the second
    # example, it would be insuficient to use a key of "BEAMCFGLIST", because that will
    # yield 4 lines, and the function is not designed to handle that.

    # ID,STR=\"Signature1000\",SN=123456
    type <- ad2cpHeaderValue(d, "ID", "STR", numeric=FALSE)
    serialNumber <- ad2cpHeaderValue(d, "ID", "SN")

    # BEAMCFGLIST,BEAM=1,THETA=25.00,PHI=0.00,FREQ=1000,BW=25,BRD=1,HWBEAM=1,ZNOM=60.00
    beam1Angle <- ad2cpHeaderValue(d, "BEAMCFGLIST,BEAM=1", "THETA")
    frequency <- ad2cpHeaderValue(d, "BEAMCFGLIST,BEAM=1", "FREQ", default=NA)
}
}