Midpoint

A method that returns the wavelength [\(nm\)] (or value) at the center of the wavelength range of objects of classes waveband or of class generic_spct or derived (or the midpoint from a numeric vector).

Usage

wl_midpoint(x, ...)

midpoint(x, ...)

# Default S3 method
midpoint(x, ...)

# S3 method for class 'numeric'
midpoint(x, ...)

# S3 method for class 'waveband'
midpoint(x, ...)

# S3 method for class 'generic_spct'
midpoint(x, ...)

# S3 method for class 'generic_mspct'
midpoint(x, ..., idx = "spct.idx")

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.

Value

A numeric value equal to max(x) - min(x)) / 2. In the case of spectral objects a wavelength [\(nm\)]. For any other R object, according to available definitions of min and max.

Methods (by class)

• midpoint(default): Default method for generic function

• midpoint(numeric): Default method for generic function

• midpoint(waveband): Wavelength at center of a "waveband".

• midpoint(generic_spct): Method for "generic_spct".

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

See also

Other wavelength summaries: wl_min(), wl_range(), wl_stepsize()

Other wavelength summaries: wl_min(), wl_range(), wl_stepsize()

Other wavelength summaries: wl_min(), wl_range(), wl_stepsize()

Examples

midpoint(10:20)
#> [1] 15
midpoint(sun.spct)
#> [1] 540
wl_midpoint(sun.spct)
#> [1] 540

midpoint(sun.spct)
#> [1] 540