Hi all, I am trying to compute the coefficients of a FIR in order to implement a digital bandstop filter. I would like to issue the command
a = LeastSquaresFilterKernel[ {"Bandstop", {{3.70, 11.8}}}, 10^5]
which would be "find 10^5 coefficients for a bandstop filter with resonance frequency 3.7 Hz and quality factor Q = 11.8" To me this request seems reasonable, at least as reasonable as
a = LeastSquaresFilterKernel[ {"Bandstop", {{1., 10}}}, 10^5 ]; (* works *)
but still, when I issue that in Mathematica I get
LeastSquaresFilterKernel::spec: {Bandstop,{{3.7,11.8}}} is not a valid filter specification.
Anyone knows what's wrong with that? Thank you very much for your suggestions.
Guido