photobiology (version 0.11.2)

spread: Expanse

Description

A method that returns the expanse ($max(x)-min(x)$) for R objects. In particular the wavelength [$nm$] expanse of the wavelength range of objects of classes waveband or of class generic_spct or derived (or the expanse of values in a numeric vector).

Usage

spread(x, ...)
wl_expanse(x, ...)
expanse(x, ...)
# S3 method for default
expanse(x, ...)
# S3 method for numeric
expanse(x, ...)
# S3 method for waveband
expanse(x, ...)
# S3 method for generic_spct
expanse(x, ...)
# S3 method for generic_mspct
expanse(x, ..., idx = "spct.idx")

Value

A numeric value equal to max(x) - min(x). In the case of spectral objects wavelength difference [$nm$]. For any other R object, according to available specialised methods of min and

max.

Arguments

x

an R object

...

not used in current version

idx

character Name of the column with the names of the members of the collection of spectra.

Methods (by class)

• expanse(default): Default method for generic function

• expanse(numeric): Method for "numeric"

• expanse(waveband): Method for "waveband"

• expanse(generic_spct): Method for "generic_spct"

• expanse(generic_mspct): Method for "generic_mspct" objects.

Examples

expanse(10:20)
expanse(sun.spct)
wl_expanse(sun.spct)

expanse(sun.spct)