abs(x)
computes the absolute value of x
, sqrt(x)
computes the (principal) square root of x
. 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.
# S3 method for generic_spct
sqrt(x)# S3 method for generic_spct
abs(x)
an object of class "generic_spct"