freqz_plot.m File Reference

Functions
function	freqz_plot (w, h) if(nargin!
	subplot (3, 1, 1)
	plot (w, mag)
	grid ("on")
	legend ("Pass band (dB)")
	axis ([w(1), w(n), maxmag-3, maxmag],"labely")
	subplot (3, 1, 2)
	legend ("Stop band (dB)")
	if (maxmag-min(mag) > 100) axis([w(1)
	w (n)
id	labely ()
else	axis ("autoy","labely")
endif	subplot (3, 1, 3)
	plot (w, phase *360/(2 *pi))
	legend ("Phase (degrees)")
	xlabel ("Frequency")
	axis ([w(1), w(n)],"autoy","label")
Variables
endif	n = length (w)
	mag = 20 * log10 (abs (h))
	phase = unwrap (arg (h))
	maxmag = max (mag)

---

Function Documentation

axis	(	"autoy"	,
		"label"
	)

else axis	(	"autoy"	,
		"labely"
	)

axis

(

"labely"

)

function freqz_plot	(	w	,
		h
	)

grid

(

"on"

)

if	(	maxmag-	minmag,
		100
	)

id labely

(

)

[virtual]

legend

(

"Phase (degrees)"

)

legend

(

"Stop band (dB)"

)

legend

(

"Pass band (dB)"

)

plot	(	w	,
		phase *360/	2 *pi
	)

plot	(	w	,
		mag
	)

endif subplot	(	3	,
		1	,
		3
	)

subplot	(	3	,
		1	,
		2
	)

subplot	(	3	,
		1	,
		1
	)

w

(

n

)

xlabel

(

"Frequency"

)

---

Variable Documentation

mag = 20 * log10 (abs (h))

maxmag = max (mag)

endif n = length (w)

phase = unwrap (arg (h))