Fourier Transforms and Signal Processing

ACORR	Auto-correlation using the convolution method
ACOV	Auto-covariance using the convolution method
ADDPHASE	Add a constant phase to a series
AMPSPEC	Complex normalized FFT
AUTOCOR	Auto-correlation, time domain
AVGFILT	Filter a series using the average of the N neighboring points
BANDPASS	Design an FIR linear phase band pass filter using the Remez Exchange method
BANDSTOP	Design an FIR linear phase band stop filter using the Remez Exchange method
BESSEL	Design an IIR Bessel digital filter.
BESTPOW2	Find the power of 2 greater than or equal to the input value or length of the input series
BILINEAR	Bilinear transformation with optional frequency pre-warping
BITQUANT	Quantize an input series to 2^bits levels
BITSCALE	Convert raw AD counts to scales engineering values
BLACKMAN	3 term Blackman window
BLACKMANHARRIS	4 term Blackman-Harris window
BUTTERWORTH	Design an IIR Butterworth digital filter.
CAS2SOS	Convert cascade filter coefficients to second order section form
CAS2TF	Convert cascade filter coefficients to direct form
CAS2ZP	Convert cascade filter coefficients to zeros, poles and gain
CASCADE	Filter a series with filter coefficients in 2nd order cascade form
CCEPS	Calculate the complex cepstrum
CHEBWIN	Dolph-Chebyshev window
CHEBY1	Design an IIR Chebyshev Type I digital filter
CHEBY2	Design an IIR Chebyshev Type II digital filter
CIRCONV	Circular convolution
CLOGMAG	Evaluate the log magnitude of cascade form filter coefficients
CONV	Convolution
CONV2D	2D convolution
COVM	Calculate the covariance matrix of an array
CPHASE	Evaluate the phase of cascade form filter coefficients
CROSSCOR	Cross-correlation, time domain
DCT	Calculate the Discrete Cosine Transform
DECILP	Decimation with low pass filtering
DECIMATE	Remove samples by a factor of n
DECONV	De-convolve two series
DEMEAN	Remove the mean (or DC value) from a series
DEMODAM	Demodulate an AM series using low pass filtering
DEMODFM	Demodulate an FM series using the Hilbert Transform
DETREND	Remove a linear trend from a series
DFT	Digital Fourier Transform, Real/Imaginary
DOWNSAMPLE	Delete every Nth sample for FIR decimation
DST	Calculate the Discrete Sine Transform
EFFBIT	Calculate the number of effective bits possible at a given frequency for a quantizing device
ELLIPTIC	Design an IIR Elliptic digital filter
ENDFLIP	Pad the ends of a series with endpoint reflections
FACORR	Auto-correlation using the FFT method
FACOV	Auto-covariance using the FFT method
FACTORS	Return the prime factors of a scalar
FCIRCONV	Circular convolution using the FFT method
FCONV	Convolution using the FFT method
FDECONV	De-convolve two series using the FFT method
FDERIV	Calculate the series derivative in the frequency domain
FFT	Fast Fourier Transform, Real/Imaginary
FFT2	2D FFT
FFTP	Fast Fourier Transform, Magnitude/Phase
FFTP2	2D FFT, Magnitude/Phase
FFTSHIFT	Shift a 1D or 2D FFT so the 0 frequency is the midpoint
FILTEQ	Evaluate a Linear Constant Coefficient Difference Equation
FINTEG	Calculate series integration in the frequency domain
FIRSAMP	Design an arbitrary FIR filter using frequency sampling
FLATTOP	Flattop window
FLATTOPWIN	Alternate 4 term flattop window
FPADFILT	FIR filtering with optional endpoint padding using the FFT
FREQS	Evaluate the frequency response of a continuous system
FREQSAMP	Design a FIR filter from a given magnitude response using the frequency sampling method
FREQZ	Evaluate the frequency response of a digital system
FXCORR	Cross correlation using the FFT method
FXCOV	Cross covariance using the FFT method
FZINTERP	Interpolate a series by a factor using FFT zero insertion
GIMPULSE	Generate an impulse series with optional spacing and delay
GRPDELAY	Calculate the group delay of a Z-transform
HAMMING	Hamming window
HANNING	Hanning window
HIGHPASS	Design an FIR linear phase high pass filter using the Remez Exchange method
HILB	Calculate a simple Hilbert transform of a real series
ICCEPS	Calculate the inverse complex cepstrum
IDCT	Calculate the Inverse Discrete Cosine Transform
IDCT2	2D IDCT
IDFT	Inverse DFT, Real/Imaginary
IDST	Calculate the Inverse Discrete Sine Transform
IFFT	Inverse FFT, Real/Imaginary
IFFT2	2D IFFT, Real/Imaginary
IFFTP	Inverse FFT, Magnitude/Phase
IFFTP2	2D IFFT, Magnitude/{hase
IFFTSHIFT	Unshift a 1D or 2D FFT so the 0 frequency is the first point
IMAGINARY	Calculate the imaginary part of the input
IMPS	Calculate the impulse response of a Laplace transform
IMPULSE	Generate discrete unit impulse series
IMPZ	Calculate the impulse response of a Z-transform
INVFREQS	Calculate the analog filter coefficients from a complex frequency response
INVFREQZ	Calculate the digital filter coefficients from a complex frequency response
INVPSD	Construct a time series from a PSD
KAISER	Kaiser window
KWBPASS	Design an FIR linear phase band pass filter using the Kaiser Window method
KWBSTOP	Design an FIR linear phase band stop filter using the Kaiser Window method
KWHPASS	Design an FIR linear phase high pass filter using the Kaiser Window method
KWLPASS	Design an FIR linear phase low pass filter using the Kaiser Window method
LINSCALE	Linearly rescale an input series
LOG2	Calculate Log base 2 of the input
LOWPASS	Design an FIR linear phase low pass filter using the Remez Exchange method
MAGNITUDE	Calculate the magnitude of the input
MAGSPEC	Calculate the magnitude of the complex amplitude spectrum
MODAM	Amplitude modulate an input series
MODFM	Frequency modulate an input series
NEXTPOW2	Determine the exponent for the next power of 2
NFFT	Calculate an N point FFT by zero padding or time aliasing
NSPECTRUM	Calculate an N point spectrum by zero padding or time aliasing
OASFILT	Filter data using the overlap and save method
PADFILT	FIR filtering with optional endpoint padding
PHASE	Calculate the phase of the input
PHASEDIFF	Calculate the phase difference between two sinusoids
PHASESPEC	Calculate the phase of the complex amplitude spectrum
POLY	Calculate coefficients of the characteristic polynomial
POLYSTAB	Stabilize a denominator polynomial by root reflection
POWSPEC	Calculate the Power Spectrum
PSD	Calculate the Power Spectral Density
QUANTIZE	Quantize an input series to N levels
RCEPS	Calculate the real cepstrum
REAL	Calculate the real part of the input
REPROOT	Indicate if a polynomial has multiple roots
RESCALE	Linearly rescale an input series
RESAMPLE	Resample an input series to an arbitrary rate
RESIDUE	Find the partial fraction expansion of a rational polynomial
RESIDUEZ	Find the partial fraction expansion of a Z-transform polynomial
SFREQ	Evaluate the frequency response of a continuous system in Hertz
SGOLAY	Generate Savitzky-Golay smoothing filter coefficients
SGOLAYFILT	Filter a series with a Savitzky-Golay smoothing filter
SHP	Emulate a single pole analog high pass filter
SHPFREQ	Single pole digital high pass filter frequency response
SINC	Calculate sin(x)/(x)
SLP	Emulate a single pole analog low pass filter
SLPFREQ	Single pole digital low pass filter frequency response
SONOGRAM	Calculate the 2D Spectrogram as a B&W image
SOS2CAS	Convert second order section form coefficients to cascade form
SOS2TF	Convert second order section form coefficients to direct form
SOS2ZP	Convert second order section form coefficients to zeros, poles and gain
SOSFILT	Filter a series with filter coefficients in second order section form
SPECGRAM	Calculate the 2D Spectrogram as an image
SPECTRUM	Magnitude of a normalized FFT
SPLANE	Display a Pole-Zero plot of an S-transform
STARMS	Calculate the short time averaged RMS series
STEPZ	Calculate the step response of a Z-transform
TAYLORWIN	Taylor window
TF2CAS	Convert direct from coefficients to cascade form
TF2SOS	Convert direct form coefficients to second order section form
TF2SS	Calculate the state-space representation
TF2ZP	Convert S plane transfer function form to zeros, poles and gain
TF2ZPK	Convert Z plane transfer function form to zeros, poles and gain
UNWRAP	Unwrap phase by adding increments of 2π
UPSAMPLE	Insert N zeros between samples for FIR interpolation
WINFUNC	Multiply a series with a spectral window
XCORR	Cross correlation using the convolution method
XCOV	Cross covariance using direct convolution
ZBPFILT	Band pass filtering by FFT zeroing
ZBSFILT	Band stop filtering by FFT zeroing
ZEROFLIP	Pad the ends of a series with endpoint reflections about 0.0
ZFREQ	Evaluate the frequency response of a Z-transform
ZHPFILT	High pass filtering by FFT zeroing
ZINTERP	Sinx/sin interpolation of periodic band limited series
ZLPFILT	Low pass filtering by FFT zeroing
ZP2CAS	Convert poles, zeros and gain to cascade coefficient form
ZP2SOS	Convert poles, zeros and gain to second order section form
ZP2TF	Convert poles, zeros and gain to transfer function form
ZPFCOEF	Design a digital filter from a set of analog (s domain) zeros and poles
ZPLANE	Display a Pole-Zero plot of a Z-transform