Signal Processing Commands barthannwin Bartlett-Hann window. besself Create a Bessel filter. besself3 Create a Bessel filter. blackman Blackman window. butter Create a Butterworth filter. buttord Design a Butterworth filter. 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. cpsd Compute cross power spectral density. downsample Downsample a signal. ellip Create an Elliptic filter. 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. 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. hamming Hamming window. hann Hann window. 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. kaiser Kaiser-Bessel window. mscohere Estimates the mean squared coherence of time domain signals. parzenwin Parzen window. pwelch Computes the power spectral density. sinc Compute the sinc function. tfestimate Estimates the transfer function from time domain signals. unwrap Unwrap a vector of phase angles. upsample Upsample a signal. welchwin Welch window. xcorr Cross correlation.