LTPDA Toolbox™ contents Method: ao/detrend   Method: ao/diff

Method ao/dft

  DFT computes the DFT of the input time-series at the requested frequencies.
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  DESCRIPTION: DFT computes the DFT of the input time-series at the requested
               frequencies.
 
  CALL:        b = dft(a, pl)
 
  Parameters Description
 
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Method Details
Access public
Defining Class ao
Sealed 0
Static 0

Parameter Description

Sets for this method …
Default

Default
no description
Key Default Value Options Description
dft
WIN 'Rectangular'
  • 'Rectangular'
  • 'Welch'
  • 'Bartlett'
  • 'Hanning'
  • 'Hamming'
  • 'Nuttall3'
  • 'Nuttall4'
  • 'Nuttall3a'
  • 'Nuttall3b'
  • 'Nuttall4a'
  • 'Nuttall4b'
  • 'Nuttall4c'
  • 'BH92'
  • 'SFT3F'
  • 'SFT3M'
  • 'FTNI'
  • 'SFT4F'
  • 'SFT5F'
  • 'SFT4M'
  • 'FTHP'
  • 'HFT70'
  • 'FTSRS'
  • 'SFT5M'
  • 'HFT90D'
  • 'HFT95'
  • 'HFT116D'
  • 'HFT144D'
  • 'HFT169D'
  • 'HFT196D'
  • 'HFT223D'
  • 'HFT248D'
  • 'Kaiser'
  • 'levelledHanning'
 The window to be applied to the data to remove the discontinuities at edges of segments. [default: taken from user prefs]
Only the design parameters of the window object are used. Enter a string value containing the window name e.g.
plist('Win', 'Kaiser', 'psll', 200)
plist('Win', 'BH92')
PSLL 200 none The peak sidelobe level for Kaiser windows.
Note: it is ignored for all other windows
SCALE 1
  • 1
  • 0
 Scale the output according to the applied window resulting in [unit] rms.
F, FREQUENCIES, F0 -1 none The vector of frequencies at which to compute the DFT
or an AO where the x-axis is taken for the frequency values.
NBINS 5 none The number of bins either side of each frequency from which to compute the mean error.The error will be computed from the bins deltaF*[-Nbins-skip:-skip skip:skip+Nbins] where deltaF = fs/Nsamples is the frequency resolution.
SKIP 3 none The number of bins either side of each frequency to ignore when computing the mean error.

Example
plist('WIN', 'Rectangular', 'PSLL', [200], 'SCALE', [true], 'F', [-1], 'NBINS', [5], 'SKIP', [3])

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Some information of the method ao/dft are listed below:
Class name ao
Method name dft
Category Signal Processing
Package name ltpda
VCS Version 967b0eec0dece803a81af8ef54ad2f8c784b20b2
Min input args 1
Max input args -1
Min output args 1
Max output args -1
Can be used as modifier 1
Supported numeric types {'double'}



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