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annotate scripts/elfun/acoth.m @ 15104:093961d9ebed gui

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Fixed self-assignment bug found by Torsten. * find-dialog.cc: Fixed self-assignment in constructor.
author Jacob Dawid <jacob.dawid@gmail.com>
date Sat, 04 Aug 2012 10:53:58 +0200
parents f3d52523cde1
children d63878346099
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72c96de7a403 maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1994-2012 John W. Eaton
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Mapping Function} {} acoth (@var{x})
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21 ## Compute the inverse hyperbolic cotangent of each element of @var{x}.
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22 ## @seealso{coth}
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23 ## @end deftypefn
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25 ## Author: jwe
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27 function y = acoth (x)
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29 if (nargin != 1)
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30 print_usage ();
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31 endif
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33 y = atanh (1 ./ x);
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35 endfunction
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38 %!test
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39 %! rt2 = sqrt (2);
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40 %! rt3 = sqrt (3);
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41 %! v = -i*[pi/6, pi/4, pi/3, -pi/3, -pi/4, -pi/6];
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42 %! x = i*[rt3, 1, rt3/3, -rt3/3, -1, -rt3];
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43 %! assert (acoth (x), v, sqrt (eps));
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45 %!error acoth ()
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46 %!error acoth (1, 2)
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