[y_fl, Y_fl, f, Y, f_fl, fl_function, filter]=f4ts(y,Fs,filter,plot1)
filter that clean the signal from diffrent kind of noise. input : signal in time, Fs (frequency of sampelling), and the filter : a spacific frequency to filter, # of harmonics (can be default), shape of the filter : square(default), gaussian, lorentzian, and filter width@ Full width half max(can be default).
can be used in older ver. of matlab
changed the input from frequency domain to the raw time domain, and make is more simple to use, with a good example