grpdelay

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

Function Synopsis

[gd_out,w_out] = grpdelay(b,a,n,dum,Fs)

Help text

GRPDELAY Group delay of a digital filter.
	[Gd,W] = GRPDELAY(B,A,N) returns length N vectors Gd and W
	containing the group delay and the frequencies (in radians) at which it 
	is evaluated. Group delay is -d{angle(w)}/dw.  The frequency
	response is evaluated at N points equally spaced around the
	upper half of the unit circle.   When N is a power of two,
	the computation is done faster using FFTs.  If you don't specify
	N, it defaults to 512.

	GRPDELAY(B,A,N,'whole') uses N points around the whole unit circle.  

	[Gd,F] = GRPDELAY(B,A,N,Fs) and [Gd,F] = GRPDELAY(B,A,N,'whole',Fs)
	given sampling frequency Fs in Hz return a vector F in Hz.

	Gd = GRPDELAY(B,A,W) and Gd = GRPDELAY(B,A,F,Fs) return the group delay
	evaluated at the points in W (in radians) or F (in Hz), where Fs is the
	sampling frequency in Hz.

	GRPDELAY(B,A,...) with no output arguments plots the group delay versus
	normalized frequency (Nyquist == 1) in the current figure window.

	See also FREQZ.

Cross-Reference Information

ceil           /tools/hpmatlab/toolbox/matlab/elfun/ceil.m
conj           /tools/hpmatlab/toolbox/matlab/elfun/conj.m
conv           /tools/hpmatlab/toolbox/matlab/datafun/conv.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
error          /tools/hpmatlab/toolbox/matlab/lang/error.m
exp            /tools/hpmatlab/toolbox/matlab/elfun/exp.m
fft            /tools/hpmatlab/toolbox/matlab/datafun/fft.m
gca            /tools/hpmatlab/toolbox/matlab/graphics/gca.m
if             /tools/hpmatlab/toolbox/matlab/lang/if.m
length         /tools/hpmatlab/toolbox/matlab/general/length.m
max            /tools/hpmatlab/toolbox/matlab/datafun/max.m
nargchk        /tools/hpmatlab/toolbox/matlab/lang/nargchk.m
nargin         /tools/hpmatlab/toolbox/matlab/elmat/nargin.m
nargout        /tools/hpmatlab/toolbox/matlab/elmat/nargout.m
newplot        /tools/hpmatlab/toolbox/matlab/graphics/newplot.m
ones           /tools/hpmatlab/toolbox/matlab/elmat/ones.m
pi             /tools/hpmatlab/toolbox/matlab/elmat/pi.m
plot           /tools/hpmatlab/toolbox/matlab/plotxy/plot.m
real           /tools/hpmatlab/toolbox/matlab/elfun/real.m
set            /tools/hpmatlab/toolbox/matlab/graphics/set.m
size           /tools/hpmatlab/toolbox/matlab/general/size.m
sqrt           /tools/hpmatlab/toolbox/matlab/elfun/sqrt.m
xlabel         /tools/hpmatlab/toolbox/matlab/plotxy/xlabel.m
ylabel         /tools/hpmatlab/toolbox/matlab/plotxy/ylabel.m
zeros          /tools/hpmatlab/toolbox/matlab/elmat/zeros.m

decimate       /tools/hpmatlab/toolbox/signal/decimate.m