"Frequency notch filtering, is it possible?"
I've been trying to find a way (after a Fourier transform) to filter out all but a very narrow band of frequencies so I can concentrate on these in the classification process I have. Is there any way I could perform a logical AND on all members of a value series to eliminate all but the ones I want?
I've been trying to use FilterTransformation but I can't quite get the sharpness and I also can't think of a way to use SingleCombinedFunction (but I have been staring at it for too long perhaps).
Thanks in advance for any advice