如何用R对干扰素进行傅里叶变换到红外光谱?

Hello people of the Internet, I have an Interferogramm (time domain) and want to to Fourier transform it into a IR Spectrum (frequency domain) to obtain the peaks of the functional groups in the molecule. FTIR (Fourier Transformation Infrared Spectroscopy) is a advanced method to determine functional groups in a molecule. The so-called interferometer is build like this:Hello people of the Internet, I have an Interfe