spectacles (version 0.5-2-2)

dimensions: Retrieve dimensions of Spectra* objects

Description

Retrieves the wavelengths units and the spectral resolution from Spectra* objects.

Returns the number of samples in the object

Usage

# S3 method for Spectra
length(x)
# S4 method for Spectra
nrow(x)
# S4 method for Spectra
ncol(x)
# S3 method for Spectra
dim(x)

Arguments

x

For nrow, length, dim, a Spectra object. For ncol, a SpectraDataFrame object.

Value

nrow, ncol, nwl, and length, return an integer, dim returns a vector of length 2 or 3 (see Details section).

Details

* Methods for Spectra objects

nrow returns the number of individuals in the collection length returns the number of wavelengths in the collection ncol returns NULL dim returns a vector containing (1) the number of individuals and (2) in the number of wavelengths in the collection

* Methods for Spectra objects

nrow returns the number of individuals in the collection length returns the number of wavelengths in the collection ncol returns the number of attributes in the collection dim returns a vector containing (1) the number of individuals, (2) in the number of wavelengths, and (3) the number of attributes in the collection

Examples

# NOT RUN {
# Loading example data
data(australia)
spectra(australia) <- sr_no ~ ... ~ 350:2500

nrow(australia)
ncol(australia)
length(australia)
dim(australia)

# }