This window provides the ability to filter the current spectrum displayed in a plot.
The various options are:
Averagetake the running average value over a number of positions.
Rebinrebin a spectrum so that one output value equals the mean of a number of input values.
Mediantake the running median value over a number of positions.
Profilesmooth the values using a profile matched to typical line shapes, Gaussian, Lorentzian and Voigt and the standard Hanning, Hamming, Welch and Barlett filters.
Waveletuse various wavelet filters to convert the spectrum into multi-resolution coefficients, removing a fraction of the coefficients, thus denoising the spectrum.
Spectrumsmooth the values using a profile defined in another spectrum (allows you to create kernels that match some shape, rather than just the standard profiles).
You can define ranges of the spectrum to apply the filter over (except for Rebin, that always applies to the whole spectrum, which is what happens for all filters if you’ve not defined any ranges). Depending on whether you’ve selected Filter inside ranges or not the ranges are used to define the parts of the spectrum to filter, or not to filter. Parts which are not filtered do not form part of the result spectrum.