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, ...)
# Default S3 method
expanse(x, ...)
# S3 method for class 'numeric'
expanse(x, ...)
# S3 method for class 'waveband'
expanse(x, ...)
# S3 method for class 'generic_spct'
expanse(x, ...)
# S3 method for class '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.