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Member of the dsp class. Use members of the filter design subclass to design filters.

Function	Description
angle	Phase angles of complex numbers
besselap	Zeros, poles, and gain of Bessel filter
besself	Bessel filter design
buttap	Zeros, poles, and gain of Butterworth filter
butter	Butterworth filter design
buttord	Butterworth filter order
cheb1ap	Zeros, poles, and gain of Chebyshev type 1 filter
cheb1ord	Chebyshev type 1 filter order
cheb2ap	Zeros, poles, and gain of Chebyshev type 2 filter
cheb2ord	Chebyshev type 2 filter order
cheby1	Chebyshev type 1 filter design
cheby2	Chebyshev type 2 filter design
convmtx	Convolution matrix
ellip	Elliptic (Cauer) filter design
ellipap	Zeros, poles, and gain of Elliptic filter
ellipord	Elliptic (Cauer) filter order
fir1	FIR filter design using windows
fir2	FIR filter design using frequency sampling
firgauss	FIR Gaussian filter design
firls	Least-squares linear FIR filter design
firpm	Parks-McClellan FIR filter design
firpmord	Parks-McClellan FIR filter order
firrcos	Raised cosine FIR filter
freqs	Computes Laplace transform
freqspace	Frequency spaces for 1D and 2D applications
freqz	Digital filter frequency response
grpdelay	Group delay of a filter
impz	Impulse response of filters
intfilt	Interpolation FIR filter design
kaiserord	Kaiser window order
lp2bp	Analog lowpass filter to bandpass
lp2bs	Analog lowpass filter to bandstop
lp2hp	Analog lowpass filter to highpass
lp2lp	Analog lowpass filter to lowpass
maxflat	Maximally flat digital filter
phasedelay	Phase delay of a filter
phasez	Phase response of a filter
remez	Parks-McClellan FIR filter design
remezord	Parks-McClellan FIR filter order
sgolay	Savitzky-Golay FIR filter design
stepz	Step response of a filter
unwrap	Unwraps phase angles
zerophase	Zero phase response of a filter
zplane	Plots zeros and poles