| Signal Processing Toolbox™ | |
Function Reference |  Alphabetical List |
|
| conv | Convolution and polynomial multiplication |
| conv2 | 2-D convolution |
| corrcoef | Correlation coefficients |
| cov | Covariance matrix |
| cplxpair | Sort complex numbers into complex conjugate pairs |
| deconv | Deconvolution and polynomial division |
| fft | Discrete Fourier transform |
| fft2 | 2-D discrete Fourier transform |
| fftshift | Shift zero-frequency component to center of spectrum |
| filter2 | 2-D digital filter |
| freqspace | Frequency spacing for frequency response |
| ifft | Inverse discrete Fourier transform |
| ifft2 | 2-D inverse discrete Fourier transform |
| unwrap | Correct phase angles to produce smoother phase plots |
|
| cfirpm | Complex and nonlinear-phase equiripple FIR filter design |
| fir1 | Window-based finite impulse response filter design |
| fir2 | Frequency sampling-based finite impulse response filter design |
| fircls | Constrained least square, FIR multiband filter design |
| fircls1 | Constrained least square, lowpass and highpass, linear phase, FIR filter design |
| firls | Least square linear-phase FIR filter design |
| firpm | Parks-McClellan optimal FIR filter design |
| firpmord | Parks-McClellan optimal FIR filter order estimation |
| intfilt | Interpolation FIR filter design |
| kaiserord | Kaiser window FIR filter design estimation parameters |
| sgolay | Savitzky-Golay filter design |
| firrcos | Raised cosine FIR filter design |
| gaussfir | Gaussian FIR pulse-shaping filter |
| butter | Butterworth analog and digital filter design |
| cheby1 | Chebyshev Type I filter design (passband ripple) |
| cheby2 | Chebyshev Type II filter design (stopband ripple) |
| ellip | Elliptic (Cauer) filter design |
| maxflat | Generalized digital Butterworth filter design |
| yulewalk | Recursive digital filter design |
| buttord | Butterworth filter order and cutoff frequency |
| cheb1ord | Chebyshev Type I filter order |
| cheb2ord | Chebyshev Type II filter order |
| ellipord | Minimum order for elliptic filters |
| abs | Absolute value (magnitude) |
| angle | Phase angle |
| filternorm | 2-norm or infinity-norm of digital filter |
| freqz | Frequency response of digital filter |
| fvtool | Open Filter Visualization Tool |
| grpdelay | Average filter delay (group delay) |
| impz | Impulse response of digital filter |
| phasedelay | Phase delay of digital filter |
| phasez | Phase response of digital filter |
| stepz | Step response of digital filter |
| zerophase | Zero-phase response of digital filter |
| zplane | Zero-pole plot |
| cconv | Modulo-N circular convolution |
| convmtx | Convolution matrix |
| fftfilt | FFT-based FIR filtering using overlap-add method |
| filter | Filter data with recursive (IIR) or nonrecursive (FIR) filter |
| filtfilt | Zero-phase digital filtering |
| filtic | Initial conditions for transposed direct-form II filter implementation |
| latcfilt | Lattice and lattice-ladder filter implementation |
| medfilt1 | 1-D median filtering |
| sgolayfilt | Savitzky-Golay filtering |
| sosfilt | Second-order (biquadratic) IIR digital filtering |
| upfirdn | Upsample, apply FIR filter, and downsample |
|
| besselap | Bessel analog lowpass filter prototype |
| buttap | Butterworth analog lowpass filter prototype |
| cheb1ap | Chebyshev Type I analog lowpass filter prototype |
| cheb2ap | Chebyshev Type II analog lowpass filter prototype |
| ellipap | Elliptic analog lowpass filter prototype |
| besself | Bessel analog filter design |
| butter | Butterworth analog and digital filter design |
| cheby1 | Chebyshev Type I filter design (passband ripple) |
| cheby2 | Chebyshev Type II filter design (stopband ripple) |
| ellip | Elliptic (Cauer) filter design |
| abs | Absolute value (magnitude) |
| freqs | Frequency response of analog filters |
| lp2bp | Transform lowpass analog filters to bandpass |
| lp2bs | Transform lowpass analog filters to bandstop |
| lp2hp | Transform lowpass analog filters to highpass |
| lp2lp | Change cutoff frequency for lowpass analog filter |
| bilinear | Bilinear transformation method for analog-to-digital filter conversion |
| impinvar | Impulse invariance method for analog-to-digital filter conversion |
| latc2tf | Convert lattice filter parameters to transfer function form |
| polyscale | Scale roots of polynomial |
| polystab | Stabilize polynomial |
| residuez | z-transform partial-fraction expansion |
| sos2ss | Convert digital filter second-order section parameters to state-space form |
| sos2tf | Convert digital filter second-order section data to transfer function form |
| sos2zp | Convert digital filter second-order section parameters to zero-pole-gain form |
| ss2sos | Convert digital filter state-space parameters to second-order sections form |
| ss2tf | Convert state-space filter parameters to transfer function form |
| ss2zp | Convert state-space filter parameters to zero-pole-gain form |
| tf2latc | Convert transfer function filter parameters to lattice filter form |
| tf2sos | Convert digital filter transfer function data to second-order sections form |
| tf2ss | Convert transfer function filter parameters to state-space form |
| tf2zp | Convert transfer function filter parameters to zero-pole-gain form |
| tf2zpk | Convert transfer function filter parameters to zero-pole-gain form |
| zp2sos | Convert zero-pole-gain filter parameters to second-order sections form |
| zp2ss | Convert zero-pole-gain filter parameters to state-space form |
| zp2tf | Convert zero-pole-gain filter parameters to transfer function form |
| barthannwin | Modified Bartlett-Hann window |
| bartlett | Bartlett window |
| blackman | Blackman window |
| blackmanharris | Minimum 4-term Blackman-Harris window |
| bohmanwin | Bohman window |
| chebwin | Chebyshev window |
| dpss | Discrete prolate spheroidal sequences (Slepian sequences) |
| dpssclear | Remove discrete prolate spheroidal sequences from database |
| dpssdir | Discrete prolate spheroidal sequences database directory |
| dpssload | Load discrete prolate spheroidal sequences from database |
| dpsssave | Save discrete prolate spheroidal sequences in database |
| flattopwin | Flat Top weighted window |
| gausswin | Gaussian window |
| hamming | Hamming window |
| hann | Hann (Hanning) window |
| kaiser | Kaiser window |
| nuttallwin | Nuttall-defined minimum 4-term Blackman-Harris window |
| parzenwin | Parzen (de la Valle-Poussin) window |
| rectwin | Rectangular window |
| taylorwin | Taylor window |
| triang | Triangular window |
| tukeywin | Tukey (tapered cosine) window |
| window | Window function gateway |
| wvtool | Open Window Visualization Tool |
| bitrevorder | Permute data into bit-reversed order |
| czt | Chirp z-transform |
| dct | Discrete cosine transform (DCT) |
| dftmtx | Discrete Fourier transform matrix |
| digitrevorder | Permute input into digit-reversed order |
| fwht | Fast Walsh–Hadamard transform |
| goertzel | Discrete Fourier transform using second-order Goertzel algorithm |
| hilbert | Discrete-time analytic signal using Hilbert transform |
| idct | Inverse discrete cosine transform |
| ifwht | Inverse Fast Walsh–Hadamard transform |
| cceps | Complex cepstral analysis |
| icceps | Inverse complex cepstrum |
| rceps | Real cepstrum and minimum phase reconstruction |
| corrmtx | Data matrix for autocorrelation matrix estimation |
| cpsd | Cross power spectral density |
| dspdata | DSP data parameter information |
| mscohere | Magnitude squared coherence |
| pburg | PSD using Burg method |
| pcov | PSD using covariance method |
| peig | Pseudospectrum using eigenvector method |
| periodogram | PSD using periodogram |
| pmcov | PSD using modified covariance method |
| pmtm | PSD using multitaper method (MTM) |
| pmusic | Pseudospectrum using MUSIC algorithm |
| pwelch | PSD using Welch's method |
| pyulear | PSD using Yule-Walker AR method |
| rooteig | Frequency and power content using eigenvector method |
| rootmusic | Frequency and power content using root MUSIC algorithm |
| spectrogram | Spectrogram using short-time Fourier transform |
| spectrum | Spectral estimation |
| tfestimate | Transfer function estimate |
| xcorr | Cross-correlation |
| xcorr2 | 2–D cross-correlation |
| xcov | Cross-covariance |
| arburg | Estimate AR model parameters using Burg method |
| arcov | Estimate AR model parameters using covariance method |
| armcov | Estimate AR model parameters using modified covariance method |
| aryule | Estimate AR model parameters using Yule-Walker method |
| invfreqs | Identify continuous-time filter parameters from frequency response data |
| invfreqz | Identify discrete-time filter parameters from frequency response data |
| prony | Prony's method for time domain IIR filter design |
| stmcb | Compute linear model using Steiglitz-McBride iteration |
| ac2poly | Convert autocorrelation sequence to prediction polynomial |
| ac2rc | Convert autocorrelation sequence to reflection coefficients |
| is2rc | Convert inverse sine parameters to reflection coefficients |
| lar2rc | Convert log area ratio parameters to reflection coefficients |
| levinson | Levinson-Durbin recursion |
| lpc | Linear prediction filter coefficients |
| lsf2poly | Convert line spectral frequencies to prediction filter coefficients |
| poly2ac | Convert prediction filter polynomial to autocorrelation sequence |
| poly2lsf | Convert prediction filter coefficients to line spectral frequencies |
| poly2rc | Convert prediction filter polynomial to reflection coefficients |
| rc2ac | Convert reflection coefficients to autocorrelation sequence |
| rc2is | Convert reflection coefficients to inverse sine parameters |
| rc2lar | Convert reflection coefficients to log area ratio parameters |
| rc2poly | Convert reflection coefficients to prediction filter polynomial |
| rlevinson | Reverse Levinson-Durbin recursion |
| schurrc | Compute reflection coefficients from autocorrelation sequence |
| decimate | Decimation — decrease sampling rate |
| downsample | Decrease sampling rate by integer factor |
| interp | Interpolation — increase sampling rate by integer factor |
| resample | Change sampling rate by rational factor |
| upfirdn | Upsample, apply FIR filter, and downsample |
| upsample | Increase sampling rate by integer factor |
| chirp | Swept-frequency cosine |
| diric | Dirichlet or periodic sinc function |
| gauspuls | Gaussian-modulated sinusoidal pulse |
| gmonopuls | Gaussian monopulse |
| pulstran | Pulse train |
| rectpuls | Sampled aperiodic rectangle |
| sawtooth | Sawtooth or triangle wave |
| sinc | Sinc |
| square | Square wave |
| tripuls | Sampled aperiodic triangle |
| vco | Voltage controlled oscillator |
| buffer | Buffer signal vector into matrix of data frames |
| cell2sos | Convert second-order sections cell array to matrix |
| db2mag | Convert decibels (dB) to magnitude |
| db2pow | Convert decibels (dB) to power |
| demod | Demodulation for communications simulation |
| eqtflength | Equalize lengths of transfer function's numerator and denominator |
| findpeaks | Find local maxima |
| mag2db | Convert magnitude to decibels (dB) |
| marcumq | Generalized Marcum Q function |
| modulate | Modulation for communications simulation |
| pow2db | Convert power to decibels (dB) |
| seqperiod | Compute period of sequence |
| sos2cell | Convert second-order sections matrix to cell array |
| strips | Strip plot |
| udecode | Decode 2n-level quantized integer inputs to floating-point outputs |
| uencode | Quantize and encode floating-point inputs to integer outputs |
| fdatool | Open Filter Design and Analysis Tool |
| fvtool | Open Filter Visualization Tool |
| sptool | Open interactive digital signal processing tool |
| wintool | Open Window Design and Analysis Tool |
| wvtool | Open Window Visualization Tool |
| Using the Filter Designer | Functions — Alphabetical List | |
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