**barthannwin**Bartlett-Hann window.

**bessel3ap**Create a normalized Bessel analog lowpass prototype filter in zero-pole-gain form.

**besselap**Create a normalized Bessel analog lowpass prototype filter in zero-pole-gain form.

**besself**Create a Bessel filter.

**besself3**Create a Bessel filter.

**blackman**Blackman window.

**buttap**Create a normalized Butterworth analog lowpass prototype filter in zero-pole-gain form.

**butter**Create a Butterworth filter.

**buttord**Design a Butterworth filter.

**cheb1ap**Create a normalized Chebyshev I analog lowpass prototype filter in zero-pole-gain form.

**cheb2ap**Create a normalized Chebyshev II analog lowpass prototype filter in zero-pole-gain form.

**cheb1ord**Design a Chebyshev I filter.

**cheb2ord**Design a Chebyshev II filter.

**chebwin**Dolph-Chebyshev window.

**cheby1**Create a Chebyshev I filter.

**cheby2**Create a Chebyshev II filter.

**chirp**Generate a chirp signal.

**cmorwavf**Generate a complex Morlet wavelet.

**cpsd**Compute cross power spectral density.

**downsample**Downsample a signal.

**dba**Acoustic A-weighting function.

**dbb**Acoustic B-weighting function.

**dbc**Acoustic C-weighting function.

**dbu**Acoustic U-weighting function.

**diric**Generate the Dirichlet function.

**ellip**Create an Elliptic filter.

**ellipap**Create a normalized Elliptic analog lowpass prototype filter in zero-pole-gain form.

**ellipord**Design an Elliptic filter.

**fft**Fast Fourier Transform.

**fft2**Two Dimensional Fast Fourier Transform.

**fftn**N dimensional fast Fourier transform (FFT).

**fftshift**Shift frequency spectrum related vectors to center the dc element

**filter**Filter a signal with an IIR or FIR filter.

**filter2**Perform 2D FIR filtering.

**filtfilt**Filter a signal forward and then backward, compensating for end effects.

**findpeaks**Locate the peaks of a signal.

**fir1**Create a digital FIR filter.

**firls**Create a digital FIR multi-band filter with a least squares fitting.

**fold**Create one-sided spectrum amplitude vectors from the two-sided equivalents.

**freq**Generate a vector of frequency locations.

**freqs**Compute analog filter frequency response values.

**freqz**Compute digital filter frequency response values.

**gauspuls**Generate a sampled Gaussian modulated sinusoidal pulse centered at zero, with a specified center frequency and fractional bandwidth.

**gmonopuls**Generate a sampled Gaussian monopulse.

**grpdelay**Compute digital filter group delay values.

**hamming**Hamming window.

**hann**Hann window.

**hilbert**Hilbert transform.

**ifft**Inverse Fast Fourier transform.

**ifft2**Two-dimensional inverse fast Fourier transform.

**ifftn**N dimensional inverse fast Fourier transform.

**ifftshift**Shift frequency spectrum related vectors to uncenter the dc element to the first position.

**impz**Compute the impulse response of a digital filter.

**invfreqs**Compute analog filter coefficients from frequency response values.

**invfreqz**Compute digital filter coefficients from frequency response values.

**istft**Inverse Short-Time Fourier Transform.

**kaiser**Kaiser-Bessel window.

**medfilt1**Applies a moving median filter in one dimension.

**mexihat**Generate a Mexican hat wavelet.

**meyeraux**Generate a Meyer auxiliary wavelet.

**mscohere**Estimates the mean squared coherence of time domain signals.

**morlet**Generate a Morlet wavelet.

**parzenwin**Parzen window.

**peak2peak**Compute signal maximum to minimum differences.

**peak2rms**Compute signal peak to rms ratios.

**pulstran**Generate a pulse train, with the pulse defined either by a function or a sampled pulse.

**pwelch**Computes the power spectral density.

**rectpuls**Generate a sampled rectangular pulse centered at zero, with a specified width.

**resample**Resample a real signal by a rational factor using a polyphase FIR filter.

**rssq**Compute root sum squared values.

**sawtooth**Generate a sawtooth wave with range [-1,1] and period 2*pi.

**shanwavf**Generate a complex Shannon wavelet.

**shiftdata**Transfer a designated matrix dimension to the lead position.

**sosfilt**Filter a real signal with a second order section IIR filter.

**square**Generate a square wave with range [-1,1] and period 2*pi.

**sinc**Compute the sinc function.

**stft**Short-Time Fourier Transform.

**spectrogram**Spectrogram.

**stairs**Generate a stair step plot.

**tfestimate**Estimates the transfer function from time domain signals.

**tripuls**Generate a sampled triangular pulse centered at zero, with a specified width and skew.

**udecode**Convert quantized integer matrix elements to floating-point values.

**uencode**Quantize real matrix elements to integer values.

**unshiftdata**Revert the order of matrix dimensions modified by shiftdata.

**unwrap**Unwrap a vector of phase angles.

**upsample**Upsample a signal.

**welchwin**Welch window.

**xcorr**Cross correlation, computed over a range of lags.

**xcov**Cross covariance, computed over a range of lags.