🔖 Feature description

@arunavabasucom @erwanp
While using the radis-app, I figured that when plotting multiple spectrum, the download-txt only downloads the x-y data for the last added spectrum. Also, since it recomputes the spectrum on the backend, the data only appears in cm-1 even when user computed the spectrum in nm.
To improve this, we can provide data for all the spectrum calculated, in the csv file. Moreover, the data would appear in the units as selected by the user.
What are your thoughts on this ?

👉 Why you want this feature!!

I have attached screenshots of how the csv file would look life after implementation of this feature.

Details of Spectra : 3000-3500 nm absorbance of CH4 and C2H6 plotted together

Before:

After: