Mercurial > hg > octave-nkf
annotate scripts/signal/bartlett.m @ 20441:83792dd9bcc1
Use in-place operators in m-files where possible.
* scripts/audio/@audioplayer/set.m, scripts/audio/@audiorecorder/set.m,
scripts/audio/mu2lin.m, scripts/elfun/cosd.m, scripts/general/del2.m,
scripts/general/profexplore.m, scripts/general/quadl.m, scripts/general/rat.m,
scripts/general/rotdim.m, scripts/help/get_first_help_sentence.m,
scripts/help/private/__strip_html_tags__.m, scripts/image/cubehelix.m,
scripts/io/textread.m, scripts/linear-algebra/duplication_matrix.m,
scripts/linear-algebra/housh.m, scripts/linear-algebra/krylov.m,
scripts/linear-algebra/logm.m, scripts/linear-algebra/normest.m,
scripts/linear-algebra/onenormest.m, scripts/optimization/fminsearch.m,
scripts/optimization/lsqnonneg.m, scripts/optimization/qp.m,
scripts/plot/appearance/annotation.m, scripts/plot/appearance/axis.m,
scripts/plot/appearance/legend.m, scripts/plot/appearance/specular.m,
scripts/plot/draw/colorbar.m, scripts/plot/draw/hist.m,
scripts/plot/draw/plotmatrix.m, scripts/plot/draw/private/__stem__.m,
scripts/plot/util/__actual_axis_position__.m,
scripts/plot/util/__gnuplot_drawnow__.m, scripts/plot/util/findobj.m,
scripts/plot/util/print.m, scripts/plot/util/private/__go_draw_axes__.m,
scripts/plot/util/private/__print_parse_opts__.m, scripts/plot/util/rotate.m,
scripts/polynomial/pchip.m, scripts/polynomial/polyaffine.m,
scripts/polynomial/polyder.m, scripts/polynomial/private/__splinefit__.m,
scripts/polynomial/residue.m, scripts/signal/arch_fit.m,
scripts/signal/arch_rnd.m, scripts/signal/bartlett.m,
scripts/signal/blackman.m, scripts/signal/freqz.m, scripts/signal/hamming.m,
scripts/signal/hanning.m, scripts/signal/spectral_adf.m,
scripts/signal/spectral_xdf.m, scripts/signal/stft.m,
scripts/sparse/bicgstab.m, scripts/sparse/cgs.m,
scripts/sparse/private/__sprand_impl__.m, scripts/sparse/qmr.m,
scripts/sparse/sprandsym.m, scripts/sparse/svds.m, scripts/specfun/legendre.m,
scripts/special-matrix/gallery.m, scripts/statistics/base/gls.m,
scripts/statistics/models/logistic_regression.m,
scripts/statistics/tests/kruskal_wallis_test.m,
scripts/statistics/tests/manova.m, scripts/statistics/tests/wilcoxon_test.m,
scripts/time/datevec.m:
Use in-place operators in m-files where possible.
author | Rik <rik@octave.org> |
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date | Tue, 26 May 2015 21:07:42 -0700 |
parents | f1d0f506ee78 |
children |
rev | line source |
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19898
4197fc428c7d
maint: Update copyright notices for 2015.
John W. Eaton <jwe@octave.org>
parents:
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1 ## Copyright (C) 1995-2015 Andreas Weingessel |
3426 | 2 ## |
3922 | 3 ## This file is part of Octave. |
4 ## | |
5 ## Octave is free software; you can redistribute it and/or modify it | |
6 ## under the terms of the GNU General Public License as published by | |
7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
8 ## your option) any later version. | |
3426 | 9 ## |
3922 | 10 ## Octave is distributed in the hope that it will be useful, but |
3191 | 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3426 | 13 ## General Public License for more details. |
14 ## | |
3191 | 15 ## You should have received a copy of the GNU General Public License |
7016 | 16 ## along with Octave; see the file COPYING. If not, see |
17 ## <http://www.gnu.org/licenses/>. | |
3191 | 18 |
3449 | 19 ## -*- texinfo -*- |
20 ## @deftypefn {Function File} {} bartlett (@var{m}) | |
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21 ## Return the filter coefficients of a Bartlett (triangular) window of length |
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22 ## @var{m}. |
3191 | 23 ## |
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24 ## For a definition of the Bartlett window see, e.g., |
19232
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25 ## @nospell{A.V. Oppenheim & R. W. Schafer}, |
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26 ## @cite{Discrete-Time Signal Processing}. |
3449 | 27 ## @end deftypefn |
3191 | 28 |
3457 | 29 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at> |
30 ## Description: Coefficients of the Bartlett (triangular) window | |
3191 | 31 |
32 function c = bartlett (m) | |
3426 | 33 |
3191 | 34 if (nargin != 1) |
6046 | 35 print_usage (); |
3191 | 36 endif |
3426 | 37 |
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38 if (! (isscalar (m) && (m == fix (m)) && (m > 0))) |
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Mike Miller <mtmiller@ieee.org>
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39 error ("bartlett: M must be a positive integer"); |
3191 | 40 endif |
3426 | 41 |
3191 | 42 if (m == 1) |
43 c = 1; | |
44 else | |
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Use in-place operators in m-files where possible.
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45 m -= 1; |
3191 | 46 n = fix (m / 2); |
4172 | 47 c = [2*(0:n)/m, 2-2*(n+1:m)/m]'; |
3191 | 48 endif |
49 | |
50 endfunction | |
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codesprint: 9 tests for bartlett.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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51 |
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52 |
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53 %!assert (bartlett (1), 1) |
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54 %!assert (bartlett (2), zeros (2,1)) |
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Fix tests for bartlett, blackman, hamming, and hanning
Mike Miller <mtmiller@octave.org>
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55 %!assert (bartlett (15), flip (bartlett (15)), 5*eps) |
d209fbae38ae
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Mike Miller <mtmiller@octave.org>
parents:
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56 %!assert (bartlett (16), flip (bartlett (16)), 5*eps) |
13062
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Andriy Shinkarchuck <adriano32.gnu@gmail.com>
parents:
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57 %!test |
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58 %! N = 9; |
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59 %! A = bartlett (N); |
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60 %! assert (A(ceil (N/2)), 1); |
13062
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parents:
11523
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61 |
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62 %!error bartlett () |
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63 %!error bartlett (0.5) |
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64 %!error bartlett (-1) |
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65 %!error bartlett (ones (1,4)) |
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66 |