besself

(/tools/hpmatlab/toolbox/signal/besself.m)

Function Synopsis

[num, den, z, p] = besself(n, Wn, ftype, anaflag)

Help text

BESSELF  Bessel analog filter design.
	[B,A] = BESSELF(N,Wn) designs an N'th order lowpass analog
	Bessel filter and returns the filter coefficients in length
	N+1 vectors B and A.  The cut-off frequency Wn must be
	greater than 0.

	If Wn is a two-element vector, Wn = [W1 W2], BESSELF returns an 
	order 2N bandpass filter with passband  W1 < W < W2.
	[B,A] = BESSELF(N,Wn,'high') designs a highpass filter.
	[B,A] = BESSELF(N,Wn,'stop') is a bandstop filter if Wn = [W1 W2].
	
	When used with three left-hand arguments, as in
	[Z,P,K] = BESSELF(...), the zeros and poles are returned in
	length N column vectors Z and P, and the gain in scalar K. 

	When used with four left-hand arguments, as in
	[A,B,C,D] = BESSELF(...), state-space matrices are returned.

	See also BESSELAP, BUTTER, CHEBY1, CHEBY2, FREQZ and FILTER.

Cross-Reference Information

besselap       /tools/hpmatlab/toolbox/signal/besselap.m
else           /tools/hpmatlab/toolbox/matlab/lang/else.m
elseif         /tools/hpmatlab/toolbox/matlab/lang/elseif.m
end            /tools/hpmatlab/toolbox/matlab/lang/end.m
if             /tools/hpmatlab/toolbox/matlab/lang/if.m
lp2bp          /tools/hpmatlab/toolbox/signal/lp2bp.m
lp2bs          /tools/hpmatlab/toolbox/signal/lp2bs.m
lp2hp          /tools/hpmatlab/toolbox/signal/lp2hp.m
lp2lp          /tools/hpmatlab/toolbox/signal/lp2lp.m
max            /tools/hpmatlab/toolbox/matlab/datafun/max.m
nargin         /tools/hpmatlab/toolbox/matlab/elmat/nargin.m
nargout        /tools/hpmatlab/toolbox/matlab/elmat/nargout.m
size           /tools/hpmatlab/toolbox/matlab/general/size.m
sqrt           /tools/hpmatlab/toolbox/matlab/elfun/sqrt.m
ss2zp          /tools/hpmatlab/toolbox/signal/ss2zp.m
zp2ss          /tools/hpmatlab/toolbox/signal/zp2ss.m