Function Index
	FilterLength FilterLength[fp, fs, Ap, As] returns the length of a FIR filter given stopband and passband edge frequencies, fp and fs, respectively, and attenuation factors in each of the two bands, Ap and As, respectively. Arguments fp and fs accept units of normalized Hz (i.e., 0≤fp,fs≤0.5). Attenuation factors are specified as decimal fractions [Her73]. See also User's Guide 9.3. Example This loads the package. In[1]:= This estimates the length of a FIR with passband edge frequency fp=0.2 Hz, stopband edge frequency fs=0.25 Hz, and peak passband and stopband ripples of 0.03 and 0.06, respectively. In[2]:= Out[2]=