GammaSpectra-class {gamma}

An S4 Class to Represent a Collection of Gamma Sectra

Description

Represents a collection of spectra of gamma ray spectrometry measurements.

Details

This class extends the base list and can only contains GammaSpectrum objects.

Access

In the code snippets below, x is a GammaSpectra object.

length(x)

Get the number of elements in x.

lengths(x)

Get the number of channels in each element of x.

get_names(x), set_names(x) <- value

Retrieves or sets the names of x according to value.

get_hash(x)

Get the MD5 hash of the raw data files.

get_channels(x)

Get the number of channels in each element of x.

get_counts(x)

Get the counts of each element of x.

get_energy(x)

Get the energy range of each element of x.

get_rates(x)

Get the count rates of each element of x.

Subset

In the code snippets below, x is a GammaSpectra object.

x[i]

Extracts the elements selected by subscript i. i can be missing or NULL, numeric or character vector or a factor. Returns a new GammaSpectra object.

x[i, j]

Like the above but allows to select a slot thru j (see examples). j is a character vector of length one. Returns a list.

x[[i]]

Extracts the elements selected by subscript i. i can be a numeric or character vector of length one. Returns the corresponding GammaSpectrum object.

Author(s)

N. Frerebeau

See Also

Other class: Baseline-class, CalibrationCurve-class, GammaSpectrum-class, PeakPosition-class, coerce()

Examples

## Import all CNF files in a given directory
spc_dir <- system.file("extdata/BDX_LaBr_1/calibration", package = "gamma")
(spc <- read(spc_dir))

## Access
get_hash(spc)
get_names(spc)
get_livetime(spc)
get_realtime(spc)

lengths(spc)
range_energy(spc)

## Subset
spc[] # All spectra
spc[NULL] # All spectra
spc[1] # The first spectrum
spc[-6] # Delete the sixth spectrum
spc[1:3] # The first three spectra
spc[c(1, 3)] # The first and third spectra
spc["BRIQUE"] # The spectrum named 'BRIQUE'
spc[c("BRIQUE", "C347")] # The spectra named 'BRIQUE' and 'C347'
spc[1:3, "energy"] # The slot 'energy' of the first three spectra
spc[[1]]
spc[["BRIQUE"]]