| log {photobiology} | R Documentation |
Logarithms and Exponentials
Description
Logarithms and Exponentials for Spectra. The functions are applied to the
spectral data, not the wavelengths. The quantity in the spectrum to which the
function is applied depends on the class of x and the current value of
output options
Usage
## S3 method for class 'generic_spct'
log(x, base = exp(1))
## S3 method for class 'generic_spct'
log2(x)
## S3 method for class 'generic_spct'
log10(x)
## S3 method for class 'generic_spct'
exp(x)
Arguments
x |
an object of class "generic_spct" |
base |
a positive number: the base with respect to which logarithms are computed. Defaults to e=exp(1). |
Value
An object of the same class as x.
Note
In most cases a logarithm of an spectral quantity will yield off-range
values. For this reason unless x is an object of base class
generic_spct, checks will not be passed, resulting in warnings or
errors.
See Also
Other math operators and functions:
MathFun,
^.generic_spct(),
convolve_each(),
div-.generic_spct,
minus-.generic_spct,
mod-.generic_spct,
plus-.generic_spct,
round(),
sign(),
slash-.generic_spct,
times-.generic_spct