Need help to convert in time domain

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Arup Barua
Arup Barua on 22 Oct 2020
Commented: Star Strider on 22 Oct 2020
I have a data file of spectrum contains wavelength and intensity. Any help how to convert the spectrum in time domain?
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Star Strider
Star Strider on 22 Oct 2020
Converting them to the time domain is not possible. First, the frerquencies do not begin at 0 Hz and are continuous to the Nyquist frequency, and second there only intensity values, those being real rather than complex.

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