applyspec: apply a function to each spectrum in a colorSpec object

In colorSpec: Color Calculations with Emphasis on Spectral Data

apply a function to each spectrum in a colorSpec object

Description

apply a function to each spectrum in a colorSpec object

Usage

## S3 method for class 'colorSpec'
applyspec( x, FUN, ... )

Arguments

x	a colorSpec object with N wavelengths
FUN	a function that takes an N-vector as argument and returns an N-vector
...	additional arguments passed to FUN

Details

applyspec() simply calls apply() with the right MARGIN.

Value

a colorSpec object with the same dimensions, wavelength, quantity, and organization. If FUN does not return an N-vector, it is an ERROR and applyspec() returns NULL.

See Also

quantity, wavelength, linearize, organization, apply

Examples

#  convert absorbance to transmittance
path = system.file( "extdata/stains/Hematoxylin.txt", package='colorSpec' )
x = readSpectra( path )
x = applyspec( x, function(y) {10^(-y)} ) # this is what linearize(x) does

colorSpec documentation built on June 10, 2025, 5:11 p.m.