Mercurial > hg > octave-lyh
annotate scripts/signal/hamming.m @ 17535:c12c688a35ed default tip lyh
Fix warnings
| author | LYH <lyh.kernel@gmail.com> |
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| date | Fri, 27 Sep 2013 17:43:27 +0800 |
| parents | f3d52523cde1 |
| children |
| rev | line source |
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maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1995-2012 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} {} hamming (@var{m}) | |
| 21 ## Return the filter coefficients of a Hamming window of length @var{m}. | |
| 3191 | 22 ## |
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Grammar check TexInfo in all .m files
Rik <rdrider0-list@yahoo.com>
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23 ## For a definition of the Hamming window, see e.g., A. V. Oppenheim & |
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[docs] "Discrete-Time Signal Processing" => @cite{Discrete-Time Signal Processing}
Brian Gough <bjg@gnu.org>
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24 ## R. W. Schafer, @cite{Discrete-Time Signal Processing}. |
| 3449 | 25 ## @end deftypefn |
| 3191 | 26 |
| 3457 | 27 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at> |
| 28 ## Description: Coefficients of the Hamming window | |
| 3191 | 29 |
| 30 function c = hamming (m) | |
| 3426 | 31 |
| 3191 | 32 if (nargin != 1) |
| 6046 | 33 print_usage (); |
| 3191 | 34 endif |
| 3426 | 35 |
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Use common code idiom for checking whether a double value is an integer.
Rik <octave@nomad.inbox5.com>
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36 if (! (isscalar (m) && (m == fix (m)) && (m > 0))) |
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Use uppercase for variable names in error() strings to match Info documentation. Only m-files done.
Rik <octave@nomad.inbox5.com>
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37 error ("hamming: M has to be an integer > 0"); |
| 3191 | 38 endif |
| 3426 | 39 |
| 3191 | 40 if (m == 1) |
| 41 c = 1; | |
| 42 else | |
| 43 m = m - 1; | |
| 44 c = 0.54 - 0.46 * cos (2 * pi * (0:m)' / m); | |
| 45 endif | |
| 3426 | 46 |
| 3191 | 47 endfunction |
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codesprint: 9 tests for hamming.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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48 |
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Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
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49 |
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Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
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50 %!assert (hamming (1), 1) |
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Rik <octave@nomad.inbox5.com>
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51 %!assert (hamming (2), (0.54 - 0.46)*ones (2,1)) |
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Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
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52 %!assert (hamming (16), fliplr (hamming (16))) |
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Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
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53 %!assert (hamming (15), fliplr (hamming (15))) |
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codesprint: 9 tests for hamming.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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54 %!test |
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Andriy Shinkarchuck <adriano32.gnu@gmail.com>
parents:
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55 %! N = 15; |
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codesprint: 9 tests for hamming.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
parents:
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56 %! A = hamming (N); |
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codesprint: 9 tests for hamming.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
parents:
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57 %! assert (A (ceil (N/2)), 1); |
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58 |
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59 %!error hamming () |
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60 %!error hamming (0.5) |
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61 %!error hamming (-1) |
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62 %!error hamming (ones (1,4)) |
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63 |