Extracts selected spectra from an object of class ir

ir_get_spectrum extracts selected spectra from an object of class ir.

Usage

ir_get_spectrum(x, what)

Arguments

x

An object of class ir.

what

A numeric vector with each element representing a row in x for which to extract the spectrum.

Value

An integer vector with the same length as wavenumber with the row indices of x corresponding to the wavenumber values in wavenumber.

Examples

x <-
   ir::ir_sample_data |>
   ir::ir_get_spectrum(what = c(5, 9))