How do I convert units?
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I have a raman spectrum that look like this:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/145727/image.jpeg)
The x-axis is in wavenumber. How do I convert it to wavelength.
The wavenumber and wavelength relation is govern by:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/145728/image.jpeg)
w = the wavenumber
λ0 = excitation wavelength, which is 785nm in this case
λ1 = the Raman spectrum wavelength, which i want to obtain in this case
The wavenumber are:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/145729/image.jpeg)
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Orion
am 15 Okt. 2014
when you do your plot, instead of plotting all your y data against wavenumber, just plot against wavelength
plot(wavenumber,[y1,..,yn]) -> plot(wavelength,[y1,..,yn])
Or if you want to change the figure already created, you need to modify the Xdata property of all your plot with a command looking like
set(findall(gca,'Type','line'),'Xdata',wavelength)
where wavelength is the new vector you just calculated, which has the same size as wavenumber.
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