I wanna get spatial frequency from FFT, just like the picture. I have already got the reflection spectrum.The wavelength and corresponding intensity are saved in Excel.
aa = xlsread(‘C:UsersjcDesktop6.27xx.xlsx’);
x = linspace(1510,1590,16001);%wavelength
y = aa(1:16001,2); %intensity
wavelength = x*1e-9;%nm
wavenumber = 1./wavelength;
wavenumberfit = linspace(wavenumber(1),wavenumber(16001),16001);I wanna get spatial frequency from FFT, just like the picture. I have already got the reflection spectrum.The wavelength and corresponding intensity are saved in Excel.
aa = xlsread(‘C:UsersjcDesktop6.27xx.xlsx’);
x = linspace(1510,1590,16001);%wavelength
y = aa(1:16001,2); %intensity
wavelength = x*1e-9;%nm
wavenumber = 1./wavelength;
wavenumberfit = linspace(wavenumber(1),wavenumber(16001),16001); I wanna get spatial frequency from FFT, just like the picture. I have already got the reflection spectrum.The wavelength and corresponding intensity are saved in Excel.
aa = xlsread(‘C:UsersjcDesktop6.27xx.xlsx’);
x = linspace(1510,1590,16001);%wavelength
y = aa(1:16001,2); %intensity
wavelength = x*1e-9;%nm
wavenumber = 1./wavelength;
wavenumberfit = linspace(wavenumber(1),wavenumber(16001),16001); fft, reflction spectrum, spatial frenquency MATLAB Answers — New Questions

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