photobiology (version 0.9.6)

reflectance: Reflectance

Description

Function to calculate the mean, total, or other summary of reflectance for spectral data stored in a reflector_spct or in an object_spct.

Usage

reflectance(spct, w.band, quantity, wb.trim, use.hinges, ...)

## S3 method for class 'default':
reflectance(spct, w.band, quantity, wb.trim, use.hinges, ...)

## S3 method for class 'reflector_spct':
reflectance(spct, w.band = NULL,
  quantity = "average", wb.trim = getOption("photobiology.waveband.trim",
  default = TRUE), use.hinges = getOption("photobiology.use.hinges", default =
  NULL), ...)

## S3 method for class 'object_spct':
reflectance(spct, w.band = NULL, quantity = "average",
  wb.trim = getOption("photobiology.waveband.trim", default = TRUE),
  use.hinges = getOption("photobiology.use.hinges", default = NULL), ...)

## S3 method for class 'reflector_mspct':
reflectance(spct, w.band = NULL,
  quantity = "average", wb.trim = getOption("photobiology.waveband.trim",
  default = TRUE), use.hinges = getOption("photobiology.use.hinges", default =
  NULL), ..., idx = !is.null(names(spct)))

## S3 method for class 'object_mspct':
reflectance(spct, w.band = NULL,
  quantity = "average", wb.trim = getOption("photobiology.waveband.trim",
  default = TRUE), use.hinges = getOption("photobiology.use.hinges", default =
  NULL), ..., idx = !is.null(names(spct)))

Arguments

spct

an R object

w.band

waveband or list of waveband objects The waveband(s) determine the region(s) of the spectrum that are summarized.

quantity

character

wb.trim

logical Flag telling if wavebands crossing spectral data boundaries are trimmed or ignored

use.hinges

logical Flag indicating whether to use hinges to reduce interpolation errors

...

other arguments

idx

logical whether to add a column with the names of the elements of spct

Value

• A single numeric value with no change in scale factor

Methods (by class)

• default: Default for generic function
• reflector_spct: Specialization for reflector_spct
• object_spct: Specialization for object_spct
• reflector_mspct: Calculates reflectance from areflector_mspct
• object_mspct: Calculates reflectance from aobject_mspct

Examples

reflectance(black_body.spct, waveband(c(400,700)))
reflectance(white_body.spct, waveband(c(400,700)))