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31 Commits

Author SHA1 Message Date
Dan Kortschak
aedb59a6f6 dsp/fourier/internal/fftpack: fix formatting 2022-08-06 07:05:17 +09:30
Dan Kortschak
5f0141ca4c all: run gofmt and generate all packages 
Changes made in dsp/fourier/internal/fftpack break the formatting used
there, so these are reverted. There will be complaints in CI.

[git-generate]
gofmt -w .
go generate gonum.org/v1/gonum/blas
go generate gonum.org/v1/gonum/blas/gonum
go generate gonum.org/v1/gonum/unit
go generate gonum.org/v1/gonum/unit/constant
go generate gonum.org/v1/gonum/graph/formats/dot
go generate gonum.org/v1/gonum/graph/formats/rdf
go generate gonum.org/v1/gonum/stat/card

git checkout -- dsp/fourier/internal/fftpack
 2022-08-06 07:05:17 +09:30
Dan Kortschak
31a0551567 dsp/window/cmd/leakage: fix floor logic 2021-09-20 19:01:56 +09:30
Dan Kortschak
95cfd38470 dsp/window/cmd/leakage: add utility command for parameter estimation 2021-09-20 19:01:56 +09:30
Dan Kortschak
ccc0da248a all: run make builds pass with go master 
Run gofmt go1.17 adds the new //go:build comments
 2021-04-19 15:00:56 +09:30
Dan Kortschak
eae7c2a69e dsp/window: clean up doc formatting 2021-04-10 19:20:49 +09:30
Dan Kortschak
b89cbb47a6 dsp/fourier: improve simple examples 2021-03-09 20:15:48 +10:30
Dan Kortschak
676e41577b dsp/window: add Values.TransformTo window functions and example 2021-01-08 19:53:22 +10:30
Dan Kortschak
5289638ec6 dsp/fourier: fix TestReversePairs for 32 bit architectures 2020-11-26 10:17:13 +10:30
Dan Kortschak
d4de93a5d4 dsp/fourier: add radix-2 and radix-4 in-place FFTs 2020-10-09 07:08:29 +10:30
Dan Kortschak
dda0908b26 dsp/window: use conventional 2dp approximate constants 2020-09-21 20:04:16 +09:30
Dan Kortschak
dfc757bb79 dsp/fourier/internal/fftpack: use explicit complex arithmetic 
name                             old time/op  new time/op  delta
RealFFTCoefficients/4-8          83.9ns ± 1%  82.3ns ± 1%   -1.89%  (p=0.000 n=10+9)
RealFFTCoefficients/100-8        2.00µs ± 1%  1.68µs ±22%  -15.76%  (p=0.022 n=10+10)
RealFFTCoefficients/256-8        5.50µs ± 1%  3.92µs ± 2%  -28.80%  (p=0.000 n=9+10)
RealFFTCoefficients/4000-8        134µs ± 5%    84µs ± 1%  -36.93%  (p=0.000 n=9+9)
RealFFTCoefficients/4096-8        154µs ± 2%    88µs ± 2%  -42.86%  (p=0.000 n=10+9)
RealFFTCoefficients/1000000-8    70.6ms ± 1%  38.2ms ± 1%  -45.99%  (p=0.000 n=10+10)
RealFFTCoefficients/1048576-8    86.4ms ± 1%  53.7ms ± 1%  -37.82%  (p=0.000 n=10+10)
RealFFTCoefficients/16777216-8    1.72s ± 1%   1.04s ± 1%  -39.58%  (p=0.000 n=9+9)
RealFFTSequence/4-8              71.4ns ± 1%  72.5ns ± 1%   +1.51%  (p=0.000 n=8+9)
RealFFTSequence/100-8            1.99µs ± 0%  1.71µs ± 0%  -14.32%  (p=0.000 n=10+10)
RealFFTSequence/256-8            5.65µs ± 0%  4.76µs ± 1%  -15.75%  (p=0.000 n=10+10)
RealFFTSequence/4000-8            140µs ± 1%   102µs ± 1%  -27.15%  (p=0.000 n=10+9)
RealFFTSequence/4096-8            174µs ± 1%   122µs ±11%  -30.01%  (p=0.000 n=9+10)
RealFFTSequence/1000000-8        67.2ms ± 1%  43.3ms ± 1%  -35.51%  (p=0.000 n=9+9)
RealFFTSequence/1048576-8        92.4ms ± 1%  61.5ms ± 1%  -33.39%  (p=0.000 n=9+10)
RealFFTSequence/16777216-8        1.61s ± 2%   1.20s ± 1%  -25.37%  (p=0.000 n=8+10)
CmplxFFTCoefficients/4-8          106ns ± 1%    94ns ± 0%  -11.24%  (p=0.000 n=9+8)
CmplxFFTCoefficients/100-8       4.24µs ± 0%  3.20µs ± 1%  -24.50%  (p=0.000 n=9+10)
CmplxFFTCoefficients/256-8       11.8µs ± 1%   8.9µs ± 0%  -24.96%  (p=0.000 n=10+10)
CmplxFFTCoefficients/4000-8       285µs ± 0%   196µs ± 1%  -31.38%  (p=0.000 n=9+10)
CmplxFFTCoefficients/4096-8       313µs ± 1%   233µs ± 1%  -25.57%  (p=0.000 n=9+10)
CmplxFFTCoefficients/1000000-8    121ms ± 1%    87ms ± 1%  -28.17%  (p=0.000 n=9+9)
CmplxFFTCoefficients/1048576-8    190ms ± 1%   122ms ± 1%  -35.88%  (p=0.000 n=9+9)
CmplxFFTCoefficients/16777216-8   3.25s ± 3%   2.49s ± 2%  -23.17%  (p=0.000 n=9+10)
CmplxFFTSequence/4-8              106ns ± 4%    94ns ± 2%  -11.14%  (p=0.000 n=10+9)
CmplxFFTSequence/100-8           4.25µs ± 1%  3.23µs ± 1%  -23.99%  (p=0.000 n=9+10)
CmplxFFTSequence/256-8           11.8µs ± 1%   8.9µs ± 0%  -24.72%  (p=0.000 n=10+8)
CmplxFFTSequence/4000-8           285µs ± 1%   195µs ± 0%  -31.60%  (p=0.000 n=10+10)
CmplxFFTSequence/4096-8           313µs ± 1%   231µs ± 1%  -26.15%  (p=0.000 n=10+10)
CmplxFFTSequence/1000000-8        120ms ± 1%    87ms ± 1%  -28.16%  (p=0.000 n=9+9)
CmplxFFTSequence/1048576-8        190ms ± 1%   121ms ± 1%  -36.24%  (p=0.000 n=10+9)
CmplxFFTSequence/16777216-8       3.25s ± 6%   2.53s ± 4%  -22.20%  (p=0.000 n=9+10)
 2020-09-21 19:04:40 +09:30
Dan Kortschak
c909a038ed dsp/fourier: add benchmarks 2020-09-21 19:04:40 +09:30
Dan Kortschak
0312e4aea8 dsp/fourier/internal/fftpack: group complex values 2020-09-21 19:04:40 +09:30
Dan Kortschak
973d5f0ae3 dsp/fourier: fix typo 2020-09-21 10:42:46 +02:00
Dan Kortschak
8cb5c961a9 dsp/fourier/internal/fftpack: fix typo 2020-09-17 20:13:59 +09:30
Dan Kortschak
8d26fba056 dsp/window: move complex sequence weighting onto Values 
This simplifies the API and removes the NaN from Inf problem.
 2020-09-16 08:39:02 +09:30
Dan Kortschak
ddc5baeb4a dsp/window: avoid NaN when infinite values appear in seq 2020-09-16 08:39:02 +09:30
Dan Kortschak
8c25d69b14 dsp/window: refactor Gaussian and Tukey windows to be each a single type 2020-09-16 08:39:02 +09:30
Dan Kortschak
880b710e3c dsp/window: add Tukey window function and simplify tests 2020-09-16 08:39:02 +09:30
Dan Kortschak
7dc1a8963b Revert "dsp/window: use half offset to exclude flanking zeros" 
This reverts efc4dabf2a

The reason for the reversion is confusion caused between different
approaches for window sizing and ease of use.
 2020-09-16 05:53:39 +09:30
Brandon Dube
1839007961 dsp/window: revert tukey 2020-09-14 22:56:50 +01:00
Brandon Dube
4df152a50f dsp/window: add Tukey 2020-09-08 21:28:33 +09:30
Dan Kortschak
da72779e7a floats/scalar: new package containing non-vector functions from floats 2020-08-07 07:59:02 +09:30
Dan Kortschak
0b84c34903 dsp/window: add comment explaining origin of documentation 2020-07-03 21:43:50 +09:30
Egon Elbre
eaed550bdd dsp: make tests parallel 2020-03-16 16:10:59 +02:00
Dan Kortschak
fd1732d5e6 dsp/window: make Gaussian a type and add a Transform method 2020-02-20 21:36:17 +10:30
Dan Kortschak
c9a7355ed9 dsp/window: add lookup table window functions 2020-02-20 21:36:17 +10:30
Dan Kortschak
efc4dabf2a dsp/window: use half offset to exclude flanking zeros 2020-02-20 19:30:39 +10:30
Dan Kortschak
d763153d4c fourier/...: move packages to within a dsp hierarchy 2020-02-19 20:03:23 +10:30
Andrei Blinnikov
54b6ee192e dsp/window: new package for functions to control spectral leakage of FFT 2020-02-19 09:36:40 +10:30