How do I convert units?

Question

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I have a raman spectrum that look like this:

The x-axis is in wavenumber. How do I convert it to wavelength.

The wavenumber and wavelength relation is govern by:

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:

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Answer 1

Orion 2014-10-15

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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.