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photobiology (version 0.11.3)

fshift_spct: fshift a spectrum

Description

This function returns a spectral object of the same class as the one supplied as argument but with the spectral data expressed on a zero-shifted scale.

Usage

fshift_spct(spct, range, col.names, f, ...)

Value

a new object of the same class as spct.

Arguments

spct

generic_spct The spectrum to be normalized

range

an R object on which range() returns a vector of length 2, with min and max wavelengths (nm)

col.names

character The name of the variable to shift with respect to zero.

f

function A summary function to be applied to spct

...

other arguments passed to f()

Details

This private function is used internally to implement the hshift() methods that are exported.