Mercurial > octave
annotate scripts/elfun/coth.m @ 27919:1891570abac8
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2020.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 06 Jan 2020 22:29:51 -0500 |
parents | b442ec6dda5c |
children | bd51beb6205e |
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27919
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update Octave Project Developers copyright for the new year
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1 ## Copyright (C) 1994-2020 The Octave Project Developers |
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2 ## |
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3 ## See the file COPYRIGHT.md in the top-level directory of this distribution |
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4 ## or <https://octave.org/COPYRIGHT.html/>. |
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5 ## |
2313 | 6 ## |
7 ## This file is part of Octave. | |
8 ## | |
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9 ## Octave is free software: you can redistribute it and/or modify it |
2313 | 10 ## under the terms of the GNU General Public License as published by |
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11 ## the Free Software Foundation, either version 3 of the License, or |
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12 ## (at your option) any later version. |
2313 | 13 ## |
14 ## Octave is distributed in the hope that it will be useful, but | |
15 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
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16 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 ## GNU General Public License for more details. |
2313 | 18 ## |
19 ## You should have received a copy of the GNU General Public License | |
7016 | 20 ## along with Octave; see the file COPYING. If not, see |
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21 ## <https://www.gnu.org/licenses/>. |
2303 | 22 |
3321 | 23 ## -*- texinfo -*- |
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24 ## @deftypefn {} {} coth (@var{x}) |
3428 | 25 ## Compute the hyperbolic cotangent of each element of @var{x}. |
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26 ## @seealso{acoth} |
3321 | 27 ## @end deftypefn |
2311 | 28 |
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29 function y = coth (x) |
2325 | 30 |
713 | 31 if (nargin != 1) |
6046 | 32 print_usage (); |
713 | 33 endif |
34 | |
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35 y = 1 ./ tanh (x); |
2325 | 36 |
2326 | 37 endfunction |
7385 | 38 |
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39 |
7385 | 40 %!test |
41 %! x = [pi/2*i, 3*pi/2*i]; | |
42 %! v = [0, 0]; | |
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43 %! assert (coth (x), v, sqrt (eps)); |
7385 | 44 |
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45 %!error coth () |
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46 %!error coth (1, 2) |