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This function can generate a number of common 1D test signals used in papers by David Donoho and colleagues (e.g. [1]_) as well as the wavelet book by Stéphane Mallat [2]_. Parameters ---------- name : {'Blocks', 'Bumps', 'HeaviSine', 'Doppler', ...} The type of test signal to generate (`name` is case-insensitive). If `name` is set to `'list'`, a list of the available test functions is returned. n : int or None The length of the test signal. This should be provided for all test signals except `'Gabor'` and `'sineoneoverx'` which have a fixed length. Returns ------- f : np.ndarray Array of length ``n`` corresponding to the specified test signal type. References ---------- .. [1] D.L. Donoho and I.M. Johnstone. Ideal spatial adaptation by wavelet shrinkage. Biometrika, vol. 81, pp. 425–455, 1994. .. [2] S. Mallat. A Wavelet Tour of Signal Processing: The Sparse Way. Academic Press. 2009. Notes ----- This function is a partial reimplementation of the `MakeSignal` function from the [Wavelab](https://statweb.stanford.edu/~wavelab/) toolbox. These test signals are provided with permission of Dr. Donoho to encourage reproducible research. Examples -------- >>> import pywt >>> camera = pywt.data.camera() >>> doppler = pywt.data.demo_signal('doppler', 1024) >>> available_signals = pywt.data.demo_signal('list') >>> print(available_signals) ['Blocks', 'Bumps', 'HeaviSine', 'Doppler', 'Ramp', 'HiSine', 'LoSine', 'LinChirp', 'TwoChirp', 'QuadChirp', 'MishMash', 'WernerSorrows', 'HypChirps', 'LinChirps', 'Chirps', 'Gabor', 'sineoneoverx', 'Piece-Regular', 'Piece-Polynomial', 'Riemann'] listNzn must be an integer >= 1gabor sineoneoverxz-Parameter n must be set to None when name is z*Parameter n must be provided when name is blocks皙?333333??bumps{Gz? heavisineg333333?g ףp= ?dopplerg?g?rampgGz?hisineg_vO?losinegioT?linchirpg?twochirp quadchirpmishmashg? wernersorrows hypchirpsigjt?gMbP?g?g(\?g? linchirpschirpsi^iy?)dtypeg?:iiNz piece-regularzpiece-polynomialriemanng?zunknown name: z. name must be one of: ) r gp= ף?r gq= ףp?g?g?g)\(?r gRQ?g(\?gQ?) @333333@gr#r") rr!rrr!@r#r$g@gffffff@r%) {Gzt?r&g~jtx?r r gQ?r r r&gMb?r&ii)lower_implemented_signals ValueErrornparangezipsignabssinpisqrtzerosintroundonesceilcosexpslicefloattruncrsum zeros_likerealfftifft)0nament n_hard_codedt0shsft0hwswposhgtwthpalphabetaf1f2menvelopetmpenvbaA1ixgi1i2jf3f4n_12n_7n_5n_3n_2n_20f5fmaf6kdiffbiasn_10sqnidxs0&& [/home/luca/screen-checking/.venv/lib/python3.14/site-packages/pywt/data/_wavelab_signals.pyrrsHb zz|v##} q5QUqL89 9 IIac1qs7AaC (^,L :: VVDBFO $a 0AH = " # F771:ii1q5!"''!*,BFFBEE6A:q1u 0E#EFF!K! 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