samples of sinc function
[x]=filt_sinc(n,fl)
:n number of samples : :fl cut-off frequency of the associated low-pass filter in Hertz. : :x samples of the sinc function :
Calculate n samples of the function sin(2*pi*fl*t)/(pi*t) for t=-(n-1)/2:(n-1)/2 (i.e. centred around the origin).
`plot`_(filt_sinc(100,0.1))