MATLAB Primer - Introduction to Digital Signal Processing and Filter Design - page 407

FIR filter design.
cremez - Complex and nonlinear phase equiripple FIR filter
design.
fir1 - Window based FIR filter design - low, high, band,
stop, multi.
fir2 - FIR arbitrary shape filter design using the frequency
sampling method.
fircls - Constrained Least Squares filter design - arbitrary
response.
fircls1 - Constrained Least Squares FIR filter design - low
and highpass.
firgauss - FIR Gaussian digital filter design.
firls - Optimal least-squares FIR filter design.
firrcos - Raised cosine FIR filter design.
intfilt - Interpolation FIR filter design.
kaiserord - Kaiser window design based filter order
estimation.
remez - Optimal Chebyshev-norm FIR filter design.
remezord - Remez design based filter order estimation.
sgolay - Savitzky-Golay FIR smoothing filter design.
IIR digital filter design.
butter - Butterworth filter design.
cheby1 - Chebyshev Type I filter design (passband ripple).
cheby2 - Chebyshev Type II filter design (stopband ripple).
ellip - Elliptic filter design.
maxflat - Generalized Butterworth lowpass filter design.
yulewalk - Yule-Walker filter design.
IIR filter order estimation.
buttord - Butterworth filter order estimation.
cheb1ord - Chebyshev Type I filter order estimation.
cheb2ord - Chebyshev Type II filter order estimation.
ellipord - Elliptic filter order estimation.
Analog lowpass filter prototypes.
besselap - Bessel filter prototype.
buttap - Butterworth filter prototype.
cheb1ap - Chebyshev Type I filter prototype (passband
ripple).
cheb2ap - Chebyshev Type II filter prototype (stopband
ripple).