played around again

allthatsounds · Nov 9, 2023 · b116262 · b116262
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diff --git a/fourier/Contents.m b/fourier/Contents.m
@@ -2,7 +2,7 @@
 %
 %  Peter L. Søndergaard, 2008 - 2023.
 %  
-%  Fourier analysis
+%  Fourier transforms
 %    DFT            -  Unitary discrete Fourier transform.
 %    IDFT           -  Inverse of |dft|.
 %    FFTREAL        -  FFT for real valued signals.
@@ -15,7 +15,7 @@
 %    PLOTFFT        -  Plot FFT coefficients.
 %    PLOTFFTREAL    -  Plot |fftreal| coefficients.
 %
-%  Cosine and Sine transforms.
+%  Cosine and Sine transforms
 %    DCTI           -  Discrete cosine transform type I
 %    DCTII          -  Discrete cosine transform type II
 %    DCTIII         -  Discrete cosine transform type III

diff --git a/periodic/Contents.m b/periodic/Contents.m
diff --git a/signals/Contents.m b/signals/Contents.m
@@ -7,16 +7,20 @@
 %    EXPCHIRP       -  Exponential chirp.
 %    LOWDISCREPANCY -  Low discrepancy sequence.
 %
-%  Audio signals
-%    BAT            -  Bat chirp.
-%    BATMASK        -  Mask for bat signal.
-%    GREASY         -  Woman speaking the word 'greasy'
-%    COCKTAILPARTY  -  Sentence by male, native English speaker.
-%    GSPI           -  Glockenspiel test signal.
-%    LINUS          -  Linus pronouncing Linux.
-%    LTFATLOGO      -  Synthetic sound from spectrogram reconstruction.
-%    OTOCLICK       -  Click-evoked otoacoustic emmision. 
-%    TRAINDOPPLER   -  Sound of passing train.
+%  Periodic functions
+%    EXPWAVE        -  Complex exponential wave.
+%    PCHIRP         -  Periodic chirp.
+%    PGAUSS         -  Periodic Gaussian.
+%    PSECH          -  Periodic SECH.
+%    PBSPLINE       -  Periodic B-splines.
+%    SHAH           -  Shah distribution.
+%    PHEAVISIDE     -  Periodic Heaviside function.
+%    PRECT          -  Periodic rectangle function.
+%    PSINC          -  Periodic sinc function.
+%    PTPFUN         -  Periodic totally positive function of finite type.
+%    PEBFUN         -  Periodic EB spline.
+%    PHERM          -  Periodic Hermite functions.
+%    HERMBASIS      -  Orthonormal basis of Hermite functions.  
 %
 %  Ramping
 %    RAMPUP         -  Rising ramp.
@@ -29,7 +33,18 @@
 %    RANGEEXPAND    -  Expand range of signal.
 %    GAINDB         -  Scale input signal.
 %
-%  Images.
+%  Sound
+%    BAT            -  Bat chirp.
+%    BATMASK        -  Mask for bat signal.
+%    GREASY         -  Woman speaking the word 'greasy'
+%    COCKTAILPARTY  -  Sentence by male, native English speaker.
+%    GSPI           -  Glockenspiel test signal.
+%    LINUS          -  Linus pronouncing Linux.
+%    LTFATLOGO      -  Synthetic sound from spectrogram reconstruction.
+%    OTOCLICK       -  Click-evoked otoacoustic emmision. 
+%    TRAINDOPPLER   -  Sound of passing train.
+%
+%  Images
 %    CAMERAMAN      -  Greyscale image of the cameraman.
 %    LICHTENSTEIN   -  Color image of the Lichtenstein castle.
 %    LTFATTEXT      -  Black and white word: 'LTFAT'.

diff --git a/periodic/expwave.m → signals/expwave.m b/periodic/expwave.m → signals/expwave.m
diff --git a/periodic/hermbasis.m → signals/hermbasis.m b/periodic/hermbasis.m → signals/hermbasis.m
diff --git a/periodic/pbspline.m → signals/pbspline.m b/periodic/pbspline.m → signals/pbspline.m
diff --git a/periodic/pchirp.m → signals/pchirp.m b/periodic/pchirp.m → signals/pchirp.m
diff --git a/periodic/pebfun.m → signals/pebfun.m b/periodic/pebfun.m → signals/pebfun.m
diff --git a/periodic/pgauss.m → signals/pgauss.m b/periodic/pgauss.m → signals/pgauss.m
diff --git a/periodic/pheaviside.m → signals/pheaviside.m b/periodic/pheaviside.m → signals/pheaviside.m
diff --git a/periodic/pherm.m → signals/pherm.m b/periodic/pherm.m → signals/pherm.m
diff --git a/periodic/prect.m → signals/prect.m b/periodic/prect.m → signals/prect.m
diff --git a/periodic/psech.m → signals/psech.m b/periodic/psech.m → signals/psech.m
diff --git a/periodic/psinc.m → signals/psinc.m b/periodic/psinc.m → signals/psinc.m
diff --git a/periodic/ptpfun.m → signals/ptpfun.m b/periodic/ptpfun.m → signals/ptpfun.m
diff --git a/periodic/shah.m → signals/shah.m b/periodic/shah.m → signals/shah.m
diff --git a/sigproc/Contents.m b/sigproc/Contents.m
@@ -2,6 +2,23 @@
 %
 %  Peter L. Søndergaard, 2007 - 2023.
 %
+%  Operations on periodic functions
+%    INVOLUTE       -  Involution.
+%    PEVEN          -  Even part of periodic function.
+%    PODD           -  Odd part of periodic function.
+%    PCONV          -  Periodic convolution.
+%    PXCORR         -  Periodic crosscorrelation.
+%    LCONV          -  Linear convolution.
+%    LXCORR	    -  Linear crosscorrelation. 
+%    ISEVENFUNCTION -  Test if function is even.
+%    MIDDLEPAD      -  Cut or extend even function.
+%
+%  Basic Time/Frequency analysis
+%    TCONV          -  Twisted convolution
+%    DSFT           -  Discrete Symplectic Fourier Transform
+%    ZAK            -  Zak transform
+%    IZAK           -  Inverse Zak transform
+%
 %  Windows and wavelets
 %    FIRWIN         -  FIR windows (Hanning,Hamming,Blackman,...).
 %    FIRKAISER      -  FIR Kaiser-Bessel window.

diff --git a/periodic/dsft.m → sigproc/dsft.m b/periodic/dsft.m → sigproc/dsft.m
diff --git a/periodic/involute.m → sigproc/involute.m b/periodic/involute.m → sigproc/involute.m
diff --git a/periodic/isevenfunction.m → sigproc/isevenfunction.m b/periodic/isevenfunction.m → sigproc/isevenfunction.m
diff --git a/periodic/izak.m → sigproc/izak.m b/periodic/izak.m → sigproc/izak.m
diff --git a/periodic/lconv.m → sigproc/lconv.m b/periodic/lconv.m → sigproc/lconv.m
diff --git a/periodic/lxcorr.m → sigproc/lxcorr.m b/periodic/lxcorr.m → sigproc/lxcorr.m
diff --git a/periodic/middlepad.m → sigproc/middlepad.m b/periodic/middlepad.m → sigproc/middlepad.m
diff --git a/periodic/pconv.m → sigproc/pconv.m b/periodic/pconv.m → sigproc/pconv.m
diff --git a/periodic/peven.m → sigproc/peven.m b/periodic/peven.m → sigproc/peven.m
diff --git a/periodic/podd.m → sigproc/podd.m b/periodic/podd.m → sigproc/podd.m
diff --git a/periodic/pxcorr.m → sigproc/pxcorr.m b/periodic/pxcorr.m → sigproc/pxcorr.m
diff --git a/periodic/tconv.m → sigproc/tconv.m b/periodic/tconv.m → sigproc/tconv.m
diff --git a/periodic/zak.m → sigproc/zak.m b/periodic/zak.m → sigproc/zak.m